move postgres changelog to the top

Author: anoadragon453

CHANGES.md

@@ -1,14 +1,12 @@
 # Synapse 1.122.0 (2025-01-14)
 
-No significant changes since 1.122.0rc1.
-
+Please note that this version of Synapse drops support for PostgreSQL 11 and 12. The minimum version of PostgreSQL supported is now version 13.
 
+No significant changes since 1.122.0rc1.
 
 
 # Synapse 1.122.0rc1 (2025-01-07)
 
-Please note that this version of Synapse drops support for PostgreSQL 11 and 12. The minimum version of PostgreSQL supported is now version 13.
-
 ### Deprecations and Removals
 
 - Remove support for PostgreSQL 11 and 12. Contributed by @clokep. ([\#18034](https://github.com/element-hq/synapse/issues/18034))