Fix broken tests on GitHub actions.

[robin-ynput]

Changelog Description

While everything still works fine locally, LabLib tests as GitHub action seems suddenly broken since a couple of weeks:

• https://github.com/ynput/LabLib/actions/runs/11352264466
• https://github.com/ynput/LabLib/actions/runs/10013629680 (latest release is OK)

After some investigation I realized the culprit seems to come from a recent OpenColorIO Release 2 weeks ago.
Fixing it back to the previous version seems to make it work back.

@jakubjezek001 @tweak-wtf, I'm not sure this is the best fix for the long-term but I cannot find have anything better for now.

Additional info

Issue is quite weird:

Run .\start.ps1 test
Windows fatal exception: access violation

Current thread 0x00001304 (most recent call first):
  File "<frozen importlib._bootstrap>", line 228 in _call_with_frames_removed
  File "<frozen importlib._bootstrap_external>", line [11](https://github.com/ynput/LabLib/actions/runs/11352264466/job/31574650242#step:9:12)73 in create_module

And what I could find on Google was not very meaningful.
spyder-ide/spyder#20909
pytest-dev/pytest#7634

Testing notes:

GitHub actions are now working.

[tweak-wtf]

good catch with the PyOpenColorIO dependency!
i believe it's fine to version lock this. what do u say @jakubjezek001 ?
the issue might be the added support for the new ACES 2.0. as the release notes say this is a preview release so likely receiving updates. check this -> https://opencolorio.readthedocs.io/en/latest/releases/ocio_2_4.html#aces-2-0-output-transforms-preview-release

when they've release a new revision of this we can give it another try.

[robin-ynput]

good catch with the PyOpenColorIO dependency! i believe it's fine to version lock this. what do u say @jakubjezek001 ? the issue might be the added support for the new ACES 2.0. as the release notes say this is a preview release so likely receiving updates. check this -> https://opencolorio.readthedocs.io/en/latest/releases/ocio_2_4.html#aces-2-0-output-transforms-preview-release

when they've release a new revision of this we can give it another try.

Hey @tweak-wtf thanks for you feedback.
Jakub is off for a few more days, should we wait for him to go back ? or do you prefer me to go ahead and merge this ?
I'm happy to fill up an issue so do not forget to revisit this on next opencolorio release.

[tweak-wtf]

alrighty. in that case i would suggest to define the dependency like this opencolorio = "<=2.3.2" and let the tests run again.
that way we're not hard-locking the dependency but allow for older versions as well if needed. whether they're supported is another question then.

i think that way we're safe to merge this.