chore(deps): update dependency setuptools to v60.7.1 (googleapis#1184)

* chore(deps): update dependency setuptools to v60.7.1

* chore: remove link to issue

pypa/setuptools#3072 is resolved.

Co-authored-by: Anthonios Partheniou <partheniou@google.com>
Co-authored-by: Bu Sun Kim <8822365+busunkim96@users.noreply.github.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==60.5.0 # pin setuptools to workaround https://github.com/pypa/setuptools/issues/3072
+setuptools==60.7.1