Add release trigger for gh-pages rebuild

[Arkaniad]

I've noticed that newly released charts don't appear immediately until I manually run the gh-pages workflow - Lets see if we can dispatch that on a release event

Pull Request Checklist

• I have added Go unit tests or Complement integration tests for this PR or I have justified why this PR doesn't need tests
• Pull request includes a sign off below using a legally identifiable name or I have already signed off privately

Signed-off-by: Rhea Danzey <[email protected]>

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.32%. Comparing base (f2db7cb) to head (6ffed4c).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3432      +/-   ##
==========================================
- Coverage   68.34%   68.32%   -0.02%     
==========================================
  Files         513      513              
  Lines       47026    47026              
==========================================
- Hits        32138    32129       -9     
- Misses      10896    10900       +4     
- Partials     3992     3997       +5     

Flag	Coverage Δ
unittests	53.27% <ø> (-0.05%)	⬇️

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