Fix 'Duplicate branch' lint offense in budgets

[andreslucena]

🎩 What? Why?

There's a CI flow failing in develop for some changes done Friday, regarding the changes to Rubocop configuration and a new feature in Budgets (#8986).

Offenses:

decidim-budgets/app/permissions/decidim/budgets/admin/permissions.rb:26:13: W: Lint/DuplicateBranch: Duplicate branch body detected.
when :project_category ...
^^^^^^^^^^^^^^^^^^^^^^
decidim-budgets/app/permissions/decidim/budgets/admin/permissions.rb:36:11: W: Lint/DuplicateBranch: Duplicate branch body detected.
when :project_scope ...
^^^^^^^^^^^^^^^^^^^
decidim-budgets/app/permissions/decidim/budgets/admin/permissions.rb:38:11: W: Lint/DuplicateBranch: Duplicate branch body detected.
when :project_selected ...
^^^^^^^^^^^^^^^^^^^^^^

This PR fixes it.

(It's difficult to detect this before merging. We could ask for people to merge when we do this kind of changes, but that could be too cumbersome/with little value and we of course can always fix it after, as this PR).

📌 Related Issues

• See https://github.com/decidim/decidim/runs/6426844156?check_suite_focus=true

Testing

"[CI] Lint code" should be passing/green.

♥️ Thank you!

[andreslucena]

Mind that there's still a failing spec that will be fixed when #9307 is merged

[andreslucena]

Already fixed by #9305, closing this