fix: fix type in docstring for map fields

Google APIs · copybara-github · commit 258ddb27e2d1 · 2022-04-07T08:03:46.000-07:00
PiperOrigin-RevId: 440107808
diff --git a/WORKSPACE b/WORKSPACE
@@ -233,7 +233,7 @@ load("@rules_python//python:pip.bzl", "pip_repositories")
 
 pip_repositories()
 
-_gapic_generator_python_version = "0.63.5"
+_gapic_generator_python_version = "0.63.8"
 
 http_archive(
     name = "gapic_generator_python",
