[Snyk] Security upgrade gunicorn from 19.9.0 to 21.2.0#20

tak-s wants to merge 1 commit intomaintak-s/PolygonObjectDetection:mainfrom

snyk-fix-62658b07d82abcbfb087d3e59d6ef986tak-s/PolygonObjectDetection:snyk-fix-62658b07d82abcbfb087d3e59d6ef986Copy head branch name to clipboard