Added pull-requests write permission for the Modules mirroring to S3 action

Signed-off-by: Ihor Aleksandrychiev <ihor.aleksandrychiev@northern.tech>

Author: aleksandrychev

.github/workflows/mirroring.yml

@@ -12,6 +12,7 @@ on:
 permissions:
   id-token: write   # This is required for requesting the JWT
   contents: write   # This is required for cfengine/create-pull-request
+  pull-requests: write
 
 jobs:
     mirroring: