`tr_solve_upper_triangular` proptest failure

https://github.com/dimforge/nalgebra/actions/runs/7510131218/job/20448144670?pr=1349#step:3:788

```text
proptest: Saving this and future failures in /home/runner/work/nalgebra/nalgebra/proptest-regressions/linalg/solve.txt
proptest: If this test was run on a CI system, you may wish to add the following line to your copy of the file. (You may need to create it.)
cc f7fc4c7afdd1e3b7ed7362292ba6794e348cc528087d076602532770afebb6cb
thread 'linalg::solve::f64::tr_solve_upper_triangular' panicked at tests/linalg/solve.rs:66:1:
Test failed: assertion failed: relative_eq!(tri.transpose() * x, b, epsilon = 1.0e-7) at tests/linalg/solve.rs:66.
minimal failing input: a = [
[
0.0,
0.0,
0.0,
0.0,
],
[
81.99902460164981,
0.9449239860549895,
0.0,
0.0,
],
[
0.0,
-27.547241340574327,
-0.0019367092613586242,
0.0,
],
[
-72.19421099008603,
0.0,
28.60568201872311,
-22.546587049471057,
],
], b = [
[
0.0,
0.0,
0.0,
0.0,
],
[
0.0,
0.0,
0.0,
0.0,
],
[
0.0,
0.0,
0.0,
0.0,
],
[
0.0,
0.0,
0.0,
0.0,
],
[
-25.13116025311182,
-2.469444853398943,
-52.87323360581658,
-41.87241868276314,
],
]
successes: 166
local rejects: 0
global rejects: 0
```