update Hyrax::Statistics::Users::OverTime#point so user graph does no…

…t break. (#6092)

the previous version of this method returned a hash that the Morris.Bar graph cannot map. this change returns an integer instead. which I believe was the initial intent.

contributing from: scientist-softserv/palni-palci#473

app/services/hyrax/statistics/users/over_time.rb

@@ -26,7 +26,9 @@ def query(date_string)
         end
 
         def point(date_string)
-          relation.where(query(date_string)).count
+          # convert the User::ActiveRecord_Relation to an array so that ".size" returns a number,
+          # instead of a hash of { user_id: size }
+          relation.where(query(date_string)).to_a.size
         end
       end
     end