fix license check in CI

.gitlab-ci.yml

@@ -80,7 +80,7 @@ check-license-header:
     image: $CI_REGISTRY_IMAGE/dev-real:$CI_COMMIT_REF_SLUG
     script:
         - >
-            ! grep \
+            grep \
                 --recursive \
                 --exclude-dir='.git' \
                 --exclude='*.json' \