chore: Update gapic-generator-python to v1.11.3 (#245)

* chore: Update gapic-generator-python to v1.11.3

PiperOrigin-RevId: 546899192

Source-Link: googleapis/googleapis@e6b1691

Source-Link: googleapis/googleapis-gen@0b3917c
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiMGIzOTE3YzQyMWNiZGE3ZmNiNjcwOTJlMTZjMzNmM2VhNDZmNGJjNyJ9

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

packages/google-cloud-gke-hub/google/cloud/gkehub_v1beta1/types/membership.py

@@ -467,6 +467,7 @@ class GkeCluster(proto.Message):
         resource_link (str):
             Immutable. Self-link of the GCP resource for
             the GKE cluster. For example:
+
             //container.googleapis.com/projects/my-project/locations/us-west1-a/clusters/my-cluster
             Zonal clusters are also supported.
         cluster_missing (bool):