rails.yml in rubocop-govuk-3.15.0

- old
+ new

@@ -11,9 +11,20 @@
     - 'db/migrate/201*'
 
 Rails:
   Enabled: true
 
+# We have custom find_by methods in several repos, which
+# we're not going to rename. This Cop also raises false
+# positives for find_by methods that are unrelated to model
+# classes, as well as for repos using Mongoid. The value
+# of the consistency this brings is limited, since we mostly
+# use find_by(key: value) anyway.
+#
+# https://github.com/rubocop-hq/rubocop/issues/3758
+Rails/DynamicFindBy:
+  Enabled: false
+
 # We commonly print output in Ruby code that has been
 # extracted from a Rake task in 'lib/'.
 Rails/Output:
   Exclude:
     - 'lib/**/*.rb'