Update Changelog with finer grained authz (#2775)

Author: travis-bowen

CHANGELOG.md

@@ -37,6 +37,8 @@ request adding CHANGELOG notes for breaking (!) changes and possibly other secti
 
 ### New Features
 
+- Added a finer grained authorization model for UpdateTable requests. Existing privileges continue to work for granting UpdateTable, such as `TABLE_WRITE_PROPERTIES`.
+  However, you can now instead grant privileges just for specific operations, such as `TABLE_ADD_SNAPSHOT`
 - Added a Management API endpoint to reset principal credentials, controlled by the `ENABLE_CREDENTIAL_RESET` (default: true) feature flag.
 - The `ENABLE_SUB_CATALOG_RBAC_FOR_FEDERATED_CATALOGS` was added to support sub-catalog (initially namespace and table) RBAC for federated catalogs.
   The setting can be configured on a per-catalog basis by setting the catalog property: `polaris.config.enable-sub-catalog-rbac-for-federated-catalogs`.