[Branch protection rule(s)] Enable restrictions for openms-docs branches

[tapaswenipathak]

1. Branch name pattern: ^(.*? )?(main|staging|develop)$(.*? )? https://rubular.com/r/3vZ1rlUIskWqbP
2. PR specific

3. include administrators.

Ref: #97.

cc @jpfeuffer.

[timosachsenberg]

somehow only worked: ^(main|staging|develop)$ but should also be ok right?
update: no not even... seems branch protection rules don't take regex

[timosachsenberg]

will do 3 rules instead (as suggested on SO)

[timosachsenberg]

done

[tapaswenipathak]

somehow only worked: ^(main|staging|develop)$ but should also be ok right?

shorter the better. https://rubular.com/r/m6mKN1shSYfBGC

update: no not even... seems branch protection rules don't take regex

both should've worked: https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/defining-the-mergeability-of-pull-requests/managing-a-branch-protection-rule#about-branch-protection-rules.

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seems to work.