no need for a CHANGELOG entry. [ci skip].

activerecord/CHANGELOG.md

-*   Fix code typo in `MysqlAdapter` when `Encoding.default_internal` is set.
-
-    Fixes #12647.
-
-    *Yves Senn*
-
 *   ActiveRecord::Base#attribute_for_inspect now truncates long arrays (more than 10 elements)
 
     *Jan Bernacki*
@@ -32,7 +26,7 @@
         vendor.users.to_a # => No exception is raised
 
 
-    Fixes: #12242, #9517, #10240
+    Fixes #12242, #9517, #10240.
 
     *Paul Nikitochkin*