(fix): minimum python version 3.11 forNamedTuple with Generic

[ilan-gold]

I was off on the version in my old comment: python/cpython#92027

In any case, we can just use typing_extensions: python/typing_extensions#44 but I don't think it's worth it so we'll just correct the feature version for the check.

Previously, this was causing issues with 3.10 as this was the case not covered (this feature broke in 3.9, but is fixed in 3.11, and we special cased <3.10).

• Closes #
• Tests added
• Release note added (or unnecessary)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.21%. Comparing base (e0b81f1) to head (cb42f98).
Report is 70 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1594      +/-   ##
==========================================
- Coverage   86.70%   84.21%   -2.50%     
==========================================
  Files          37       37              
  Lines        5974     5974              
==========================================
- Hits         5180     5031     -149     
- Misses        794      943     +149     

Files with missing lines	Coverage Δ
src/anndata/_settings.py	94.03% <100.00%> (ø)

... and 8 files with indirect coverage changes