bench: only run bench if benchmark appears in label

[franckgaga]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.63%. Comparing base (7a39951) to head (c6e0af7).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #253   +/-   ##
=======================================
  Coverage   98.63%   98.63%           
=======================================
  Files          26       26           
  Lines        4458     4458           
=======================================
  Hits         4397     4397           
  Misses         61       61           

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