Fix minor issue with Dependabot update workflow

[Mrtenz]

This fixes a couple minor issues with the Dependabot update workflow:

• The update won't be retriggered anymore after MetaMask bot pushes the new commits.
• I've updated the commit message so it doesn't include the quotes. Turns out those were unnecessary.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.88%. Comparing base (9fc883a) to head (ae50098).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3070   +/-   ##
=======================================
  Coverage   94.88%   94.88%           
=======================================
  Files         506      506           
  Lines       11124    11124           
  Branches     1703     1703           
=======================================
  Hits        10555    10555           
  Misses        569      569           

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