GitHub Actions: Add Python 3.13 to the testing

[cclauss]

Python 3.13 is blocked waiting on numba>=0.61.0 -- https://pypi.org/project/numba/0.60.0/#history
and triton>3.1.0 -- https://pypi.org/project/triton/#history

dependencies = [
  "triton>=2; python_version<'3.13' and (platform_machine=='x86_64' and sys_platform=='linux') or sys_platform=='linux2'",
]

• Python 3.13 builds triton-lang/triton#5215

[rdinkel]

Hey,
what is the current state here?
triton 3.2.0 is available.
I am asking because the flatpak of kdenlive ships with python 3.13 and installing whisper inside fails building wheel.

[cclauss]

@jongwook Tests on Python 3.13 now pass with the new versions of numba and triton.