chore: fix broken links

Author: parthea

packages/google-auth-oauthlib/docs/index.rst

@@ -24,7 +24,7 @@ code from `GitHub`_ and install from source.
 
 .. _pip: https://pip.pypa.io
 .. _GitHub:
-  https://github.com/googleapis/google-cloud-python/packages/google-auth-oauthlib
+  https://github.com/googleapis/google-cloud-python/tree/main/packages/google-auth-oauthlib
 
 Usage
 -----
@@ -38,7 +38,7 @@ google-auth-oauthlib is made available under the Apache License, Version 2.0.
 For more details, see `LICENSE`_
 
 .. _LICENSE:
-    https://github.com/googleapis/google-cloud-python/packages/google-auth-oauthlib/LICENSE
+    https://github.com/googleapis/google-cloud-python/tree/main/packages/google-auth-oauthlib/LICENSE
 
 Contributing
 ------------

packages/google-auth-oauthlib/setup.py

@@ -41,7 +41,7 @@
     author_email="googleapis-packages@google.com",
     description="Google Authentication Library",
     long_description=long_description,
-    url="https://github.com/googleapis/google-cloud-python/packages/google-auth-oauthlib",
+    url="https://github.com/googleapis/google-cloud-python/tree/main/packages/google-auth-oauthlib",
     packages=find_namespace_packages(
         exclude=(
             "docs*",