Merge pull request #10118 from yasserhussain1110/unprotect-branch-not-found-message

API: Change the argument of `not_found!` in `:id/repository/branches/:branch/unprotect`

lib/api/branches.rb

@@ -64,7 +64,7 @@ module API
         authorize_admin_project
 
         @branch = user_project.repository.find_branch(params[:branch])
-        not_found!("Branch does not exist") unless @branch
+        not_found!("Branch") unless @branch
         protected_branch = user_project.protected_branches.find_by(name: @branch.name)
         protected_branch.destroy if protected_branch