ci: Do not enforce userid on nightly PR comment

This avoid issues when two different users work on a single PR.

.github/workflows/nightly_pr_comment.yml

@@ -14,13 +14,12 @@ jobs:
             const {owner, repo} = context.repo;
             const run_id = ${{github.event.workflow_run.id}};
             const pull_head_sha = '${{github.event.workflow_run.head_sha}}';
-            const pull_user_id = ${{github.event.sender.id}};
 
             const issue_number = await (async () => {
               const pulls = await github.pulls.list({owner, repo});
               for await (const {data} of github.paginate.iterator(pulls)) {
                 for (const pull of data) {
-                  if (pull.head.sha === pull_head_sha && pull.user.id === pull_user_id) {
+                  if (pull.head.sha === pull_head_sha) {
                     return pull.number;
                   }
                 }