[ci skip] Add author's name to CHANGELOG

actionpack/CHANGELOG.md

@@ -2,6 +2,8 @@
     is empty anyway.  (It used to do that when called like `url_for(controller:
     'x', action: 'y', q: {})`.)
 
+    *Paul Grayson*
+
 *   Catch invalid UTF-8 querystring values and respond with BadRequest
 
     Check querystring params for invalid UTF-8 characters, and raise an