Bump gunicorn from 20.1.0 to 21.2.0#35

dependabot[bot] wants to merge 1 commit intomainpythoninthegrasses/docker_101:mainfrom

dependabot/pip/gunicorn-21.2.0pythoninthegrasses/docker_101:dependabot/pip/gunicorn-21.2.0Copy head branch name to clipboard