Add pr update and rebase acls to user tokens

Packit needs this ACLs to be able to update PRs it has already created.
We are implementing this feature:
https://github.com/packit/packit/issues/2182

Packit needs this ACLs just in distgit.

roles/distgit/pagure/templates/pagure.cfg

@@ -271,6 +271,8 @@ USER_ACLS = [
     'pull_request_comment',
     'pull_request_flag',
     'pull_request_merge',
+    'pull_request_update',
+    'pull_request_rebase',
     'modify_project',
     'update_watch_status',
 ]
@@ -282,6 +284,8 @@ CROSS_PROJECT_ACLS = [
     'pull_request_close',
     'pull_request_comment',
     'pull_request_merge',
+    'pull_request_update',
+    'pull_request_rebase',
     'pull_request_flag',
     'update_watch_status',
 ]