Restore automatic spec updates

[maxbelanger]

This was broken due to an issue with the token used to create the PR. This changes the workflow to use the GITHUB_TOKEN provided to the action instead, but we have to disable the formal request for review made to the sdk-maintainers group for now.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.26%. Comparing base (41e4b00) to head (f691206).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #494   +/-   ##
=======================================
  Coverage   64.26%   64.26%           
=======================================
  Files          31       31           
  Lines       52606    52606           
  Branches     3841     3841           
=======================================
  Hits        33808    33808           
  Misses      18638    18638           
  Partials      160      160           

Flag	Coverage Δ
integration	64.17% <ø> (ø)
unit	63.70% <ø> (ø)

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