Updated rule name

Author: JonRowe

.rubocop_rspec_base.yml

@@ -84,7 +84,7 @@ Style/PercentLiteralDelimiters:
 
 # We have too many special cases where we allow generator methods or prefer a
 # prefixed predicate due to it's improved readability.
-Naming/PredicateName:
+Naming/PredicatePrefix:
   Enabled: false
 
 # On 1.8 `proc` is `lambda`, so we use `Proc.new` to ensure we get real procs on all supported versions.