use gh cli (#8725)

.github/workflows/pr-deploy.yaml

@@ -39,18 +39,15 @@ jobs:
         id: pr_number
         run: |
           set -euxo pipefail
-          if [[ ${{ github.event_name }} == "workflow_dispatch" ]]; then
-            PR_NUMBER=${{ github.event.inputs.pr_number }}
-            PR_TITLE=$(gh pr view $PR_NUMBER --json title | jq -r '.title')
-          else
-            PR_NUMBER=${{ github.event.issue.number }}
-            PR_TITLE='${{ github.event.issue.title }}'
-          fi
+          PR_NUMBER=$(gh pr view ${{ github.event.inputs.pr_number }} --json number | jq -r '.number')
+          PR_TITLE=$(gh pr view $PR_NUMBER --json title | jq -r '.title')
           PR_BRANCH=$(gh pr view $PR_NUMBER --json headRefName | jq -r '.headRefName')
           echo "PR_URL=https://github.com/coder/coder/pull/$PR_NUMBER" >> $GITHUB_OUTPUT
           echo "PR_NUMBER=$PR_NUMBER" >> $GITHUB_OUTPUT
           echo "PR_TITLE=$PR_TITLE" >> $GITHUB_OUTPUT
           echo "PR_BRANCH=$PR_BRANCH" >> $GITHUB_OUTPUT
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set required tags
         id: set_tags