chore: Update gapic-generator-python to v1.11.4 (#219)

* chore: Update gapic-generator-python to v1.11.4

PiperOrigin-RevId: 547897126

Source-Link: googleapis/googleapis@c09c75e

Source-Link: googleapis/googleapis-gen@45e0ec4
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiNDVlMGVjNDM0MzUxN2NkMGFhNjZiNWNhNjQyMzJhMTgwMmMyZjk0NSJ9

* 🦉 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-binary-authorization/google/cloud/binaryauthorization_v1/types/resources.py

@@ -77,6 +77,7 @@ class Policy(proto.Message):
             Optional. Per-istio-service-identity
             admission rules. Istio service identity spec
             format:
+
             spiffe://<domain>/ns/<namespace>/sa/<serviceaccount>
             or <domain>/ns/<namespace>/sa/<serviceaccount>
             e.g. spiffe://example.com/ns/test-ns/sa/default