Fix Codex workflow gh usage

.github/workflows/codex-pr-triage.yml

@@ -28,6 +28,7 @@ jobs:
       - name: Resolve PR context
         id: gate
         env:
+          GH_REPO: ${{ github.repository }}
           GH_TOKEN: ${{ github.token }}
         run: |
           pr_number="${{ github.event.workflow_run.pull_requests[0].number }}"

.github/workflows/pr-failure-codex-dispatch.yml

@@ -90,7 +90,7 @@ jobs:
         run: |
           gh api -X POST -H "Accept: application/vnd.github+json" \
             /repos/${{ github.repository }}/issues/${PR_NUMBER}/labels \
-            -f labels='["codex-fix-attempted"]'
+            -f labels[]=codex-fix-attempted
 
       - name: Checkout PR head
         uses: actions/checkout@v5