chore: update charm libraries (#348)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

lib/charms/data_platform_libs/v0/data_interfaces.py

@@ -331,7 +331,7 @@ def _on_topic_requested(self, event: TopicRequestedEvent):
 
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
-LIBPATCH = 47
+LIBPATCH = 48
 
 PYDEPS = ["ops>=2.0.0"]
 
@@ -3760,6 +3760,10 @@ def _on_relation_changed_event(self, event: RelationChangedEvent) -> None:
                 event.relation, app=event.app, unit=event.unit
             )
 
+    def _on_secret_changed_event(self, event: SecretChangedEvent) -> None:
+        """Event emitted when the relation data has changed."""
+        pass
+
 
 class OpenSearchProvides(OpenSearchProvidesData, OpenSearchProvidesEventHandlers):
     """Provider-side of the OpenSearch relation."""