rubocop-migrations.yml in gitlab-styles-4.3.0 vs rubocop-migrations.yml in gitlab-styles-5.0.0

@@ -1,4 +1,5 @@
+---
 # Checks for methods that may lead to batch type issues on a table that's been
 # explicitly denied because of its size.
 #
 # Even though these methods perform functions to avoid
 # downtime, using it with tables with millions of rows still causes a