Log Message:
py-sip6: updated to 6.9.1

v6.9.1

sip-sdist creates PEP 625 compatible file names

The sdists created by sip-sdist are now compatible with PEP 625 in that they \ 
have lower case names. This ensures that they will still be able to be uploaded \ 
to PyPI.

Update the minimum version of setuptools

The minimum version of setuptools used by SIP and by the generated sip module \ 
sdists has been set to v69.5. This is the oldest version that supports PEP 625.

sip module sdist Requires-Python is incorrect

The minimum Python version in the generated sip module metadata is now set to v3.9.