Pin numpy to 1.26.x

[oursland]

Currently numpy>=2 have issues when installed from conda-forge. Furthermore, VFX Platform currently standardizes on numpy==1.26.

This PR pins numpy to 1.26 which should resolve the current issues plaguing recent releases and ensuring compatibility with other VFX Platform compliant systems.

[oursland]

Addresses #375.

[hyarion]

Should we document why we pin to these versions or how do we update them safely in the future?

[oursland]

Perhaps, but it seems to be a combination of using the latest releases of some (i.e. occt), the LTS of others (i.e. Qt), and VFX Platform, with a sprinkling of upstream compatible builds which may not be the most current.

Things like sticking to Python 3.11 was initially to keep some addons compatible with Blender. Blender is now aligned with VFX Platform, and thus we now have an actual reference we can refer to other than "we don't want to break some addons with 3rd party dependencies."

[oursland]

I've merged this to get it in before the next weekly build. I'll test it after the build completes to see if it addresses the issues experienced by macros and workbenches that depend upon numpy.