tighter regex for bs generated files

Author: leostera

config.yml

@@ -59,7 +59,7 @@ steps:
     filename: "./lib/js/src/Index.bs.js"
     action_id: index_bs_js
   - type: gate
-    left: '/Generated by BUCKLESCRIPT/gm'
+    left: '/^\/\/ Generated by BUCKLESCRIPT VERSION \d+\.\d+\.\d+, PLEASE EDIT WITH CARE$/gm'
     operator: test
     right: '%actions.index_bs_js%'
   - type: respond