Disable merge request requirement for opennlp-2.x (#789)

Author: rzo1

.asf.yaml

@@ -12,7 +12,7 @@ github:
         dismiss_stale_reviews: false
         require_code_owner_reviews: false
         required_approving_review_count: 1
-    opennlp-2.x:
+    opennlp-2.x:  {}
   autolink_jira:
     - OPENNLP
   custom_subjects: