Avoid duplicate runs (#791)

Author: aarongustafson

.github/workflows/process-submission.yml

@@ -21,6 +21,8 @@ jobs:
       github.event_name == 'workflow_dispatch' ||
       (github.event_name == 'issue_comment' && 
        github.event.issue.pull_request == null &&
+       github.event.sender.login != 'github-actions[bot]' &&
+       github.event.sender.login != 'github-actions' &&
        contains(github.event.comment.body, '/process')) ||
       (github.event_name == 'issues' && github.event.label.name == 'approved')
     runs-on: ubuntu-latest