[CI] Restore missing key in docker-bench-security

.gitlab-ci.yml

@@ -125,7 +125,7 @@ clair:
 # Run docker-bench-security and upload the results
 docker-bench-security:
   stage: security-tests
-  tags: [build]
+  <<: *pull-modified-image
   script:
     # Change the Docker Compose to use the "testing" image, not yet pushed on production registry
     - sed -i -e "s|$MODIFIED_IMAGE_FULL|$MODIFIED_IMAGE_FULL_TEST|g" $MODIFIED_IMAGE/docker-compose.yml