Move notices up

Author: babolivier

CHANGES.md

@@ -1,16 +1,15 @@
 Synapse 1.48.0 (2021-11-30)
 ===========================
 
-No significant changes since 1.48.0rc1.
+This release removes support for the long-deprecated `trust_identity_server_for_password_resets` configuration flag.
 
+This release also fixes some performance issues with some background database updates introduced in Synapse 1.47.0.
+
+No significant changes since 1.48.0rc1.
 
 Synapse 1.48.0rc1 (2021-11-25)
 ==============================
 
-This release removes support for the long-deprecated `trust_identity_server_for_password_resets` configuration flag.
-
-This release also fixes some performance issues with some background database updates introduced in Synapse 1.47.0.
-
 Features
 --------