Use "Pull Request" instead of "Merge Request" (#8003)

Signed-off-by: kolaente <k@knt.li>

options/locale/locale_en-US.ini

@@ -946,7 +946,7 @@ issues.review.reviewers = Reviewers
 issues.review.show_outdated = Show outdated
 issues.review.hide_outdated = Hide outdated
 
-pulls.desc = Enable merge requests and code reviews.
+pulls.desc = Enable pull requests and code reviews.
 pulls.new = New Pull Request
 pulls.compare_changes = New Pull Request
 pulls.compare_changes_desc = Select the branch to merge into and the branch to pull from.