ci(homebrew): don't update tap for forks

[ReenigneArcher]

Description

Skip attempting to update brew tap when running workflow in forks.

Screenshot

Issues Fixed or Closed

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency update (updates to dependencies)
• Documentation update (changes to documentation)
• Repository update (changes to repository files, e.g. .github/...)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the in code docstring/documentation-blocks for new or existing methods/components

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 9.82%. Comparing base (024bd8f) to head (b8a7ff1).
Report is 1 commits behind head on master.

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #3255   +/-   ##
======================================
  Coverage    9.82%   9.82%           
======================================
  Files         101     101           
  Lines       17980   17980           
  Branches     8417    8417           
======================================
  Hits         1766    1766           
  Misses      13323   13323           
  Partials     2891    2891           

Flag	Coverage Δ
Linux	7.27% <ø> (ø)
Windows	5.10% <ø> (ø)
macOS-13	10.71% <ø> (-0.02%)	⬇️
macOS-14	10.01% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.