chore: use gapic-generator-python 0.53.4

docs: list oneofs in docstring

committer: busunkim96@
PiperOrigin-RevId: 406468269

Author: Google APIs

WORKSPACE

@@ -232,7 +232,7 @@ load("@rules_python//python:pip.bzl", "pip_repositories")
 
 pip_repositories()
 
-_gapic_generator_python_version = "0.53.0"
+_gapic_generator_python_version = "0.53.4"
 
 http_archive(
     name = "gapic_generator_python",