MONGOID-5302 Replace Hash#update_values with ActiveSupport's transform_values! (#5234)

* Hash#update_values can be replaced with ActiveSupport#transform_values!

* MONGOID-5302 add docs removing the methods

* MONGOID-5302 fix docs

Co-authored-by: shields <[email protected]>
Co-authored-by: Neil Shweky <[email protected]>

Author: johnnyshields

source/release-notes/mongoid-8.0.txt

@@ -336,3 +336,10 @@ to have been used outside of Mongoid:
 - ``Mongoid::Extensions::Date::EPOCH``
 - ``Mongoid::Extensions::Time::EPOCH``
 - ``Mongoid::Factory::TYPE``
+
+
+Removed ``Array#update_values`` and ``Hash#update_values`` methods
+------------------------------------------------------------------
+
+The previously deprecated ``Array#update_values`` and ``Hash#update_values``
+methods have been removed in Mongoid 8.