[py] Bump version to 4a6

Cr-Mirrored-From: https://chromium.googlesource.com/external/github.com/SeleniumHQ/selenium
Cr-Mirrored-Commit: 5f43a29cfccd9c7fb5adca5d69ed168150edb39f
diff --git a/setup.py b/setup.py
index 8dffbbb..84cf34f 100755
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@
 setup_args = {
     'cmdclass': {'install': install},
     'name': 'selenium',
-    'version': "4.0.0a5",
+    'version': "4.0.0a6",
     'license': 'Apache 2.0',
     'description': 'Python bindings for Selenium',
     'long_description': open(join(abspath(dirname(__file__)), "README.rst")).read(),