[MINOR] Rotate changelog since 24.2.0-RC has been cut (#6604)

Signed-off-by: Simon Dudley <[email protected]>

CHANGELOG.md

@@ -1,10 +1,12 @@
 # Changelog
 
-## 24.2.1-SNAPSHOT
+## Next Release
 
 ### Breaking Changes
 - RocksDB database metadata format has changed to be more expressive, the migration of an existing metadata file to the new format is automatic at startup. Before performing a downgrade to a previous version it is mandatory to revert to the original format using the subcommand `besu --data-path=/path/to/besu/datadir storage revert-metadata v2-to-v1`.
 
+### Upcoming Breaking Changes
+
 ### Deprecations
 
 ### Additions and Improvements
@@ -13,6 +15,8 @@
 
 ### Bug fixes
 
+### Download Links
+
 ## 24.2.0-SNAPSHOT
 
 ### Breaking Changes