ci: attempt to fix homebrew action

[woile]

Reading the docs from the action it says that it may have issues if running on ubuntu.
I thought it would be nice to run on macos and see if it works

https://github.com/dawidd6/action-homebrew-bump-formula

[codecov]

Codecov Report

Merging #339 (0de30b9) into master (1a33099) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #339   +/-   ##
=======================================
  Coverage   97.20%   97.20%           
=======================================
  Files          35       35           
  Lines        1000     1000           
=======================================
  Hits          972      972           
  Misses         28       28           

Flag	Coverage Δ
unittests	97.20% <100.00%> (ø)

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Impacted Files	Coverage Δ
commitizen/cli.py	97.50% <ø> (ø)
commitizen/__version__.py	100.00% <100.00%> (ø)
commitizen/commands/bump.py	94.44% <100.00%> (ø)
commitizen/config/yaml_config.py	100.00% <100.00%> (ø)
commitizen/git.py	95.55% <100.00%> (ø)

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[woile]

mental note: if this doesn't work I'll ask to the developer of the action to help us out