chore: Update gapic-generator-python to v1.8.5

Google APIs · copybara-github · commit a45d9c09c128 · 2023-02-23T14:46:55.000-08:00
PiperOrigin-RevId: 511892190
diff --git a/WORKSPACE b/WORKSPACE
@@ -317,7 +317,7 @@ load("@rules_python//python:pip.bzl", "pip_install")
 
 pip_install()
 
-_gapic_generator_python_version = "1.8.4"
+_gapic_generator_python_version = "1.8.5"
 
 http_archive(
     name = "gapic_generator_python",
