docs: update project URL (#413)

diff --git a/setup.py b/setup.py
index 29abec2..0078aaf 100644
--- a/setup.py
+++ b/setup.py
@@ -39,7 +39,7 @@
     author_email="googleapis-packages@google.com",
     description="Google Authentication Library",
     long_description=long_description,
-    url="https://github.com/GoogleCloudPlatform/google-auth-library-python",
+    url="https://github.com/googleapis/google-auth-library-python",
     packages=find_packages(exclude=("tests*", "system_tests*")),
     namespace_packages=("google",),
     install_requires=DEPENDENCIES,