Merge pull request rails#52165 from rails/fxn/changelog

Register 8b173d9 in the guides CHANGELOG

Author: fxn

guides/CHANGELOG.md

@@ -1,2 +1,10 @@
+*   The guide _Classic to Zeitwerk HOWTO_ that documented how to migrate from
+    the `classic` autoloader to Zeitwerk has been deleted.
+
+    The last version of this guide can be found
+    [here](https://guides.rubyonrails.org/v7.2/classic_to_zeitwerk_howto.html),
+    in case you need it.
+
+    *Petrik de Heus*
 
 Please check [7-2-stable](https://github.com/rails/rails/blob/7-2-stable/guides/CHANGELOG.md) for previous changes.