Run workflow on pushes to save cache (backport #364)

[mergify]

See ros-controls/ros2_control_ci#384 for reference

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This is an automatic backport of pull request #364 done by Mergify.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.63%. Comparing base (4b9e4c1) to head (f96b13f).

Additional details and impacted files

@@           Coverage Diff           @@
##           humble     #365   +/-   ##
=======================================
  Coverage   72.63%   72.63%           
=======================================
  Files          10       10           
  Lines         581      581           
  Branches      223      223           
=======================================
  Hits          422      422           
  Misses        105      105           
  Partials       54       54           

Flag	Coverage Δ
unittests	72.63% <ø> (ø)

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