[bazel.build] Problem with /rules/lib/core

### Page link:

https://bazel.build/rules/lib/core

### Problem description (include actual vs expected text, if applicable):

This page states that the Starlark Language Specification has a data type "json". This data type is not defined in the spec page, nor in the Go implementation spec page.

https://github.com/bazelbuild/starlark/blob/master/spec.md
https://github.com/google/starlark-go/blob/master/doc/spec.md

### Where do you see this issue? (include link to specific section of the page, if applicable)

This data type is not specified in the language specification, and given that this page does not contain the specification either, this type is not defined.

### Any other information you'd like to share?

_No response_

Start with the linked bazel.build/rules/lib/core page and compare its Starlark type list with the linked Starlark specification pages. Remove or correct the unsupported “json” type entry, then verify that the published page no longer presents it as part of the language specification.

Written by the indexing model from the issue text.