update description

rails/rubocop/rubocop-base.yml

@@ -127,6 +127,7 @@ Rails/SkipsModelValidations:
 
 # BEGIN Style
 # prevent getting around most cops, but allow a few that may be impossible to resolve otherwise, f.e.:
+# ItcGemRubocop/NocPortalRz: allow usage of string that contains `"noc-portal.rz.rwth-aachen.de"` if really needed
 # Lint/UnusedMethodArgument: subclasses that are passed unused keyword args, but not using them must be allowed
 # Naming/PredicateName: allow DSL style methods like Rails 'has_one'
 # Naming/VariableNumber: allow passing keyword args to other libraries that violate naming conventions