use GH_TOKEN instead of GITHUB_TOKEN for the cli

Author: upodroid

.github/workflows/argocd-diff.yaml

@@ -37,7 +37,7 @@ jobs:
 
       - name: Post diff as comment
         env:
-          GITHUB_TOKEN: ${{ secrets.K8S_INFRA_CI_BOT_PR_TOKEN }}
+          GH_TOKEN: ${{ secrets.K8S_INFRA_CI_BOT_PR_TOKEN }}
         run: |
           gh pr comment ${{ github.event.number }} --repo ${{ github.repository }} --body-file output/diff.md --edit-last || \
           gh pr comment ${{ github.event.number }} --repo ${{ github.repository }} --body-file output/diff.md