update ruff to 0.16

[methane]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 92.30769% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 90.56%. Comparing base (e2a908b) to head (60c45a8).
⚠️ Report is 48 commits behind head on main.

Files with missing lines	Patch %	Lines
src/MySQLdb/__init__.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #794      +/-   ##
==========================================
+ Coverage   88.86%   90.56%   +1.69%     
==========================================
  Files           7        7              
  Lines         548      551       +3     
==========================================
+ Hits          487      499      +12     
+ Misses         61       52       -9     

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