Merge branch '330605-enable-ci_modified_paths_of_external_prs' into 'master'

Enable the FF ci_modified_paths_of_external_prs

See merge request gitlab-org/gitlab!67458

config/feature_flags/development/ci_modified_paths_of_external_prs.yml

@@ -5,4 +5,4 @@ rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/330605
 milestone: '13.12'
 type: development
 group: group::pipeline authoring
-default_enabled: false
+default_enabled: true