Move serializable changes into the main change log.

Author: tim-schilling

docs/changes.rst

@@ -1,9 +1,11 @@
 Change log
 ==========
 
-Serializable (don't include in main)
-------------------------------------
+Pending
+-------
 
+* Added support for checking if pytest as the test runner when determining
+  if tests are running.
 * Defines the ``BaseStore`` interface for request storage mechanisms.
 * Added the setting ``TOOLBAR_STORE_CLASS`` to configure the request
   storage mechanism. Defaults to ``debug_toolbar.store.MemoryStore``.
@@ -27,12 +29,6 @@ Serializable (don't include in main)
 * Added ``debug_toolbar.store.DatabaseStore`` for persistent debug data
   storage.
 
-Pending
--------
-
-* Added support for checking if pytest as the test runner when determining
-  if tests are running.
-
 5.2.0 (2025-04-29)
 ------------------