Fix follow limit validator reporting lower number past threshold (#9230)

* Fix follow limit validator reporting lower number past threshold

* Avoid floating point follow limit

app/validators/follow_limit_validator.rb

@@ -14,7 +14,7 @@ class FollowLimitValidator < ActiveModel::Validator
       if account.following_count < LIMIT
         LIMIT
       else
-        account.followers_count * RATIO
+        [(account.followers_count * RATIO).round, LIMIT].max
       end
     end
   end