Fix/gradle updater

[vaind]

The public GHA doesn't work ... let's just use our custom workflow instead (it also had other issues, like not updating a changelog which would again make the created PRs fail)

#skip-changelog

[codecov-commenter]

Codecov Report

Merging #2156 (1f82b1b) into main (9679043) will not change coverage.
The diff coverage is n/a.

❗ Current head 1f82b1b differs from pull request most recent head 7f992c6. Consider uploading reports for the commit 7f992c6 to get more accurate results

@@            Coverage Diff            @@
##               main    #2156   +/-   ##
=========================================
  Coverage     80.94%   80.94%           
  Complexity     3290     3290           
=========================================
  Files           233      233           
  Lines         12044    12044           
  Branches       1594     1594           
=========================================
  Hits           9749     9749           
  Misses         1712     1712           
  Partials        583      583           

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