[Snyk] Upgrade antd from 4.18.9 to 4.21.6 (#87)

fix: upgrade antd from 4.18.9 to 4.21.6

Snyk has created this PR to upgrade antd from 4.18.9 to 4.21.6.

See this package in npm:
https://www.npmjs.com/package/antd

See this project in Snyk:
https://app.snyk.io/org/cvat/project/6c66365f-c154-46f2-b5db-4a4cd35fea4d?utm_source=github&utm_medium=referral&page=upgrade-pr

cvat-ui/package.json

@@ -33,7 +33,7 @@
     "@types/react-share": "^3.0.3",
     "@types/redux-logger": "^3.0.9",
     "@types/resize-observer-browser": "^0.1.6",
-    "antd": "~4.18.0",
+    "antd": "~4.21.6",
     "copy-to-clipboard": "^3.3.1",
     "cvat-canvas": "file:../cvat-canvas",
     "cvat-canvas3d": "file:../cvat-canvas3d",