ci: pr_metadata_check: run the script in unbuffered mode

Makes it easier to debug since there's stuff handling race conditions
now.

Signed-off-by: Fabio Baltieri <[email protected]>

Author: fabiobaltieri

.github/workflows/pr_metadata_check.yml

@@ -34,4 +34,4 @@ jobs:
 
       - name: Run the check script
         run: |
-          ./scripts/ci/do_not_merge.py -p "${{ github.event.pull_request.number }}"
+          python -u scripts/ci/do_not_merge.py -p "${{ github.event.pull_request.number }}"