chore: update authorized_user.json and use latest sphinx (#900)

* chore: update authorized_user.json

* chore: use latest sphinx

* 🦉 Updates from OwlBot

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: busunkim96

noxfile.py

@@ -137,9 +137,7 @@ def docs(session):
     """Build the docs for this library."""
 
     session.install("-e", ".[aiohttp]")
-    session.install(
-        "sphinx<3.0.0", "alabaster", "recommonmark", "sphinx-docstring-typing"
-    )
+    session.install("sphinx", "alabaster", "recommonmark", "sphinx-docstring-typing")
 
     shutil.rmtree(os.path.join("docs", "_build"), ignore_errors=True)
     session.run(