feat(git-node): rebase staging commits after promoting a release

[aduh95]

If there are commits on the staging branch, we probably want to keep them on top of the release commit. Staging branches and release proposal are usually in sync, however it's never the case for security releases.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.76%. Comparing base (52994d8) to head (b5040a6).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #934   +/-   ##
=======================================
  Coverage   79.76%   79.76%           
=======================================
  Files          39       39           
  Lines        4630     4630           
=======================================
  Hits         3693     3693           
  Misses        937      937           

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