Disable temporarily the Metrics/AbcSize cop for IssuableBaseService#update

Signed-off-by: Rémy Coutable <remy@rymai.me>

app/services/issuable_base_service.rb

@@ -165,7 +165,7 @@ class IssuableBaseService < BaseService
     # To be overridden by subclasses
   end
 
-  def update(issuable)
+  def update(issuable) # rubocop:disable Metrics/AbcSize
     change_state(issuable)
     change_subscription(issuable)
     change_todo(issuable)