chore(25.3.0): Add Hive memory reservation increase

Author: Techassi

modules/ROOT/partials/release-notes/release-25.3.adoc

@@ -31,11 +31,16 @@ They have been stabilised in OPA 1.0 and are now implicitly imported.
 Druid::
 
 The default memory limits have been increased for following roles:
+
 * Coordinator: From `512Mi` to `768Mi`
 * Middle Manager: From `1Gi` to `1500Mi`.
 
 NOTE: Upgrades to existing deployments could cause memory limits to be reached on the node/namespace.
 
+Hive::
+
+The the default memory reservation of Hive metastore has been increased from `512Mi` to `768Mi` to avoid OOMKilled events.
+
 Bug fixes::
 
 * Previously, pods with a Listener volume were stuck in an "Unknown" state after their node was restarted.