fix(ci): Allow commit messages to start with a capital

[jponge]

This relaxes the commit linter checks, otherwise this very commit would fail.

Fixes: #2044

[jponge]

/cc @mkouba 😇

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.12%. Comparing base (5fd4d22) to head (af449ab).
⚠️ Report is 13 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2045      +/-   ##
============================================
+ Coverage     89.08%   89.12%   +0.03%     
- Complexity     3121     3123       +2     
============================================
  Files           412      412              
  Lines         13295    13295              
  Branches       1688     1688              
============================================
+ Hits          11844    11849       +5     
+ Misses          819      817       -2     
+ Partials        632      629       -3     

see 16 files with indirect coverage changes

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