chore: Update gapic-generator-python to v1.6.1

Google APIs · copybara-github · commit 08f275f5c1c0 · 2022-11-12T04:59:46.000-08:00
PiperOrigin-RevId: 488036204
diff --git a/WORKSPACE b/WORKSPACE
@@ -292,7 +292,7 @@ load("@rules_python//python:pip.bzl", "pip_install")
 
 pip_install()
 
-_gapic_generator_python_version = "1.6.0"
+_gapic_generator_python_version = "1.6.1"
 
 http_archive(
     name = "gapic_generator_python",
