Fix JavaScript lint errors

## JavaScript Linting Failures

Linting failures were detected in the automated JavaScript lint workflow run.

### Workflow Details

- Run: https://github.com/stdlib-js/stdlib/actions/runs/25350784830
- Type: JavaScript Linting
- Date: 2026-05-05 00:29:15 UTC

### Error Details
```
make[1]: Entering directory '/home/runner/work/stdlib/stdlib'

Linting file: lib/node_modules/@stdlib/random/streams/chisquare/examples/index.js

Linting file: lib/node_modules/@stdlib/ndarray/dispatch-by/examples/add.js

Linting file: lib/node_modules/@stdlib/ndarray/some-by/examples/index.js

Linting file: lib/node_modules/@stdlib/math/base/special/copysignf/examples/index.js
x: 24.8088, y: -3.7098 => -24.8088
x: 16.7168, y: 3.4662 => 16.7168
x: -40.1215, y: 3.0446 => 40.1215
x: 30.1375, y: -3.8856 => -30.1375
x: -28.3060, y: -0.7413 => -28.3060
x: 13.8797, y: -3.1197 => -13.8797
x: -38.7959, y: 1.1136 => 38.7959
x: 29.4133, y: -4.6916 => -29.4133
x: 18.2689, y: 4.6091 => 18.2689
x: -13.4270, y: -2.9441 => -13.4270
x: -28.0396, y: 1.9376 => 28.0396
x: -14.7031, y: 3.0604 => 14.7031
x: 28.2291, y: 4.2225 => 28.2291
x: 19.0336, y: 4.8859 => 19.0336
x: 27.6087, y: 3.7574 => 27.6087
x: -5.1748, y: -0.6418 => -5.1748
x: -7.8075, y: -0.1998 => -7.8075
x: -32.7107, y: 0.3083 => 32.7107
x: -37.9514, y: -4.7708 => -37.9514
x: -27.0455, y: -1.6295 => -27.0455
x: 28.3508, y: -1.8743 => -28.3508
x: -28.0708, y: 1.6051 => 28.0708
x: 40.1687, y: 1.4051 => 40.1687
x: 29.4959, y: -3.3690 => -29.4959
x: 49.9081, y: -4.6580 => -49.9081
x: -45.1273, y: 3.7088 => 45.1273
x: 20.6904, y: -4.4598 => -20.6904
x: -31.6660, y: -4.6425 => -31.6660
x: 37.5420, y: -2.2382 => -37.5420
x: 8.0472, y: -3.6292 => -8.0472
x: 19.2675, y: -0.2404 => -19.2675
x: -29.2387, y: 1.9365 => 29.2387
x: 15.4650, y: -4.5727 => -15.4650
x: 38.9993, y: -2.2187 => -38.9993
x: -21.2950, y: 0.4285 => 21.2950
x: -14.3037, y: 1.3560 => 14.3037
x: 27.5039, y: 0.6014 => 27.5039
x: 41.9408, y: 3.4503 => 41.9408
x: 15.9232, y: 3.7750 => 15.9232
x: 4.8297, y: -4.7053 => -4.8297
x: 37.5201, y: 4.8526 => 37.5201
x: -2.8705, y: 0.2860 => 2.8705
x: -28.3115, y: 2.0728 => 28.3115
x: 25.8446, y: -2.7269 => -25.8446
x: 32.8215, y: -3.0570 => -32.8215
x: 16.1414, y: 4.6024 => 16.1414
x: 20.1688, y: 2.2531 => 20.1688
x: 28.2778, y: 4.8492 => 28.2778
x: -47.0880, y: -4.2208 => -47.0880
x: -13.0523, y: -3.8727 => -13.0523
x: -12.8336, y: 1.6456 => 12.8336
x: -48.5319, y: -3.3861 => -48.5319
x: -21.8567, y: -3.8854 => -21.8567
x: -40.4495, y: 0.5941 => 40.4495
x: 35.5746, y: 4.1030 => 35.5746
x: -9.3982, y: 2.4898 => 9.3982
x: 4.3144, y: -4.4609 => -4.3144
x: -19.4816, y: 1.0779 => 19.4816
x: 18.8338, y: 2.1119 => 18.8338
x: -7.7648, y: -0.3377 => -7.7648
x: -42.6051, y: 3.7386 => 42.6051
x: -42.4005, y: -4.5177 => -42.4005
x: -22.2343, y: 3.5681 => 22.2343
x: 17.1855, y: 0.5036 => 17.1855
x: -45.8256, y: 0.7708 => 45.8256
x: 17.5307, y: -4.3055 => -17.5307
x: -38.4070, y: 3.4041 => 38.4070
x: -38.5935, y: 0.3544 => 38.5935
x: 40.0365, y: 1.7536 => 40.0365
x: -40.4995, y: -3.2645 => -40.4995
x: 23.4468, y: 1.3690 => 23.4468
x: 14.1834, y: -1.6891 => -14.1834
x: 33.5113, y: -2.2602 => -33.5113
x: -30.4852, y: -4.0947 => -30.4852
x: 0.8501, y: -3.1983 => -0.8501
x: -34.4649, y: 0.9328 => 34.4649
x: -7.1871, y: 0.5887 => 7.1871
x: 22.0860, y: 3.7756 => 22.0860
x: 8.1553, y: -1.1006 => -8.1553
x: 28.9939, y: 2.2775 => 28.9939
x: 38.0639, y: 2.6539 => 38.0639
x: 43.8447, y: -4.5925 => -43.8447
x: -17.4804, y: 0.3221 => 17.4804
x: -7.2309, y: 3.5949 => 7.2309
x: -4.9967, y: 4.8781 => 4.9967
x: -34.2898, y: 4.6554 => 34.2898
x: 21.9146, y: 0.6812 => 21.9146
x: -43.6829, y: -4.0454 => -43.6829
x: -8.1281, y: -3.5021 => -8.1281
x: -27.5902, y: 2.8029 => 27.5902
x: 33.7120, y: -3.3629 => -33.7120
x: 45.1548, y: -4.6430 => -45.1548
x: -4.9550, y: 4.0803 => 4.9550
x: 9.2501, y: 4.1823 => 9.2501
x: 29.0542, y: 0.9822 => 29.0542
x: -12.0907, y: -4.8646 => -12.0907
x: -43.4340, y: -1.1190 => -43.4340
x: -6.8359, y: 4.6252 => 6.8359
x: 48.9485, y: -4.0558 => -48.9485
x: 9.7676, y: -4.0545 => -9.7676

Linting file: lib/node_modules/@stdlib/_tools/eslint/rules/jsdoc-doctest-marker/examples/index.js

Linting file: lib/node_modules/@stdlib/_tools/github/dispatch-workflow/examples/index.js

Oops! Something went wrong! :(

ESLint: 8.57.1

RangeError: Invalid time value
at Date.toISOString ()
at done (/home/runner/work/stdlib/stdlib/lib/node_modules/@stdlib/_tools/github/dispatch-workflow/lib/query.js:86:64)
at onError (/home/runner/work/stdlib/stdlib/lib/node_modules/@stdlib/_tools/github/dispatch-workflow/lib/request.js:80:10)
at IncomingMessage.onEnd (/home/runner/work/stdlib/stdlib/lib/node_modules/@stdlib/_tools/github/dispatch-workflow/lib/request.js:126:11)
at IncomingMessage.emit (node:events:536:35)
at endReadableNT (node:internal/streams/readable:1698:12)
at process.processTicksAndRejections (node:internal/process/task_queues:82:21)
Linting failed.

Linting file: lib/node_modules/@stdlib/string/base/remove-last-grapheme-cluster/examples/index.js

Linting file: lib/node_modules/@stdlib/math/iter/special/tan/examples/index.js

Linting file: lib/node_modules/@stdlib/blas/ext/base/ndarray/ssort/examples/index.js

Linting file: lib/node_modules/@stdlib/number/float32/base/from-word/examples/index.js
make[1]: *** [/home/runner/work/stdlib/stdlib/tools/make/lib/lint/javascript/eslint.mk:261: eslint-files] Error 1
make[1]: Leaving directory '/home/runner/work/stdlib/stdlib'
make: *** [/home/runner/work/stdlib/stdlib/tools/make/lib/lint/javascript/Makefile:158: lint-javascript-files] Error 2
```

### Pull Request Instructions

- Please use the following PR title format:
"chore: fix JavaScript lint errors (issue #)".
- Reference this issue in the "Related Issues" section of the PR body as "resolves #".

Start by reproducing the JavaScript lint workflow and inspect lib/node_modules/@stdlib/_tools/github/dispatch-workflow/lib/query.js around line 86, along with request.js around lines 80 and 126. Trace the invalid date reported by Date.toISOString, then rerun the lint workflow and confirm that all listed files pass.

索引モデルが issue の本文から書いたものです。