Make sure PR goes to the upstream repo/

Author: desrosj

.github/workflows/backport.yml

@@ -298,17 +298,16 @@ jobs:
             PR_HEAD="${STEPS_BACKPORT_BRANCH_OUTPUTS_NAME}"
           fi
 
-          PR_URL=$(gh pr create \
-            --repo "${PR_REPO}" \
+          PR_URL=$(GH_REPO="${PR_REPO}" gh pr create \
             --base "${MATRIX_BRANCH}" \
             --head "${PR_HEAD}" \
             --title "$PR_TITLE" \
             --assignee "${GITHUB_ACTOR}" \
             --draft \
             --body "$(echo -e "$BODY")")
 
-          if gh label list --repo "${PR_REPO}" --json name --jq '[.[].name] | contains(["Auto-backport"])' | grep -q 'true'; then
-            gh pr edit "$PR_URL" --repo "${PR_REPO}" --add-label 'Auto-backport'
+          if GH_REPO="${PR_REPO}" gh label list --json name --jq '[.[].name] | contains(["Auto-backport"])' | grep -q 'true'; then
+            GH_REPO="${PR_REPO}" gh pr edit "$PR_URL" --add-label 'Auto-backport'
           else
             echo "::notice::The 'Auto-backport' label does not exist on ${PR_REPO}. Consider adding it so that backport pull requests can be identified easily."
           fi