Registers e3027257 in the CHANGELOG [ci skip]

References #34253.

activesupport/CHANGELOG.md

+*   Improve the logic that detects non-autoloaded constants.
+
+    *Jan Habermann*, *Xavier Noria*
+
 *   Deprecate `ActiveSupport::Multibyte::Unicode#pack_graphemes(array)` and `ActiveSuppport::Multibyte::Unicode#unpack_graphemes(string)`
     in favor of `array.flatten.pack("U*")` and `string.scan(/\X/).map(&:codepoints)`, respectively.