Update Protected Branches codeowners text string for consistency

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Context

In Source Code settings, the Protected branches section and Branch rules sections have a setting for Require code owner approval. However, the text string is slightly inconsistent between all 3 areas:

!213475 (comment 2906731625)

Group - Protected branches	Project - Protected branches	Project - Branch rules
Creation: Require approval from code owners Overview table: Code owner approval	Creation: Require approval from code owners Overview table: Code owner approval	Setting text: Require code owner approval

It's odd that the text is inconsistent between: creating a new Protected branch, Protected branch overview table, Branch rule setting. In an ideal world, I would recommend unifying all 3 pieces of text but I know we were looking to remove Protected branches because it was redundant with Branch rules. So I'm not sure how worth it it is to update all the UI text...

Design recommendation

Update the UI text to Require code owner approval for the Group Protected branches and Project Protected branches sections. Branch rules is already using the correct text.

Group - Protected branches	Project - Protected branches	Project - Branch rules
Creation: Require code owner approval Overview table: Require code owner approval	Creation: Require code owner approval Overview table: Require code owner approval	Setting text: Require code owner approval