Update rebase.yml

Author: mauriciopoppe

.github/workflows/rebase.yml

@@ -8,7 +8,10 @@ jobs:
     runs-on: ubuntu-latest
     if: >-
       github.event.issue.pull_request != '' &&
-      github.event.comment.author_association == 'MEMBER' &&
+      (
+        github.event.comment.author_association == 'CONTRIBUTOR' ||
+        github.event.comment.author_association == 'OWNER'
+      ) &&
       (
         contains(github.event.comment.body, '/rebase') ||
         contains(github.event.comment.body, '/autosquash')