chore(deps): update dependency setuptools to v60.9.3 (googleapis#1214)

Co-authored-by: Anthonios Partheniou <partheniou@google.com>
Co-authored-by: Dov Shlachter <dovs@google.com>

Author: 3 people

requirements.txt

@@ -7,4 +7,4 @@ protobuf==3.19.4
 pypandoc==1.7.2
 PyYAML==6.0
 dataclasses==0.6  # TODO(busunkim) remove when 3.6 support is dropped
-setuptools==60.9.2
+setuptools==60.9.3