Update system-tests-pr.yaml

Author: franvila

.github/workflows/system-tests-pr.yaml

@@ -64,6 +64,8 @@ jobs:
           TEST_CLIENTS="[$(echo "$client_types" | sed 's/[^,]*/"&"/g')]"
           echo "test_clients=$TEST_CLIENTS" >> $GITHUB_OUTPUT
       - name: 'Get PR labels'
+        env:
+          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}
         run: |
           PR_LABELS=[$(echo $(gh api --jq '.labels.[].name' /repos/{owner}/{repo}/pulls/${{ github.event.pull_request.number }}) | sed 's/ /,/g')]
           echo "LABELS=$PR_LABELS" >> "$GITHUB_ENV"