Document the new step to Open gates before pushing to integration.git

[sarjona]

Now doors are officially closed using the "Moodle Repository Force-Push Interface" button. This commit documents the extra step needed to Open gates before pushing changes to integration.git

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.39%. Comparing base (5c66cac) to head (c1ca685).

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #104   +/-   ##
=========================================
  Coverage     85.39%   85.39%           
  Complexity       86       86           
=========================================
  Files             2        2           
  Lines           267      267           
=========================================
  Hits            228      228           
  Misses           39       39           

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[HuongNV13]

Thanks, Sara, for adding the new steps.
It looks good to me!