[BUG]: test workflow is not running tests in nested test directories

[Planeshifter]

As reported in main repository:

stdlib-js/stdlib#2096

Time estimate without AI: 15min.
Time estimate with AI: 15min.

[Planeshifter]

PR-URL: stdlib-js/stdlib#5358

[Planeshifter]

Time to completion: 19min

Time after initial PR: 0min.

[Planeshifter]

Notes: I spent most of the time to SSH into the GitHub actions runner to change the script and be able to verify its behavior in the correct environment. I ended looking up the syntax for combining two wholename conditions via StackOverflow, so assume I would have been a couple minutes faster with the help of AI.

[Planeshifter]

Loom URL:

https://www.loom.com/share/f1c3519767384e86a493373edb95adcc?sid=2b5d616f-f8e2-4ff0-b8cd-66517323ad59

(video cuts off before making the needed changes in the IDE after making the edits to the script remotely in the GitHub Actions runner via pico).