Update saf_action step to use -T flag

Signed-off-by: Joyce Quach <jquach@mitre.org>

Author: jtquach1

.github/workflows/verify-s3.yml

@@ -54,4 +54,4 @@ jobs:
       - name: Ensure the scan meets our results threshold
         uses: mitre/saf_action@v1
         with:
-          command_string: 'validate:threshold -i results.json -F threshold.yml'
+          command_string: 'validate:threshold -i results.json -T threshold.yml'