fix(pvc-handler): update selector for PVC cleaning (#633)

Author: philipp94831

kpops/component_handlers/kubernetes/pvc_handler.py

@@ -16,7 +16,9 @@ def __init__(self, app_name: str, namespace: str) -> None:
         self._client = AsyncClient(namespace=namespace)
 
     async def list_pvcs(self) -> AsyncIterable[PersistentVolumeClaim]:
-        return self._client.list(PersistentVolumeClaim, labels={"app": self.app_name})  # pyright: ignore[reportUnknownMemberType]
+        return self._client.list(
+            PersistentVolumeClaim, labels={"app.kubernetes.io/name": self.app_name}
+        )  # pyright: ignore[reportUnknownMemberType]
 
     async def delete_pvcs(self, dry_run: bool) -> None:
         pvc_names: list[str] = [