fix: upgrade antd from 3.26.19 to 3.26.20

Snyk has created this PR to upgrade antd from 3.26.19 to 3.26.20.

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

See this project in Snyk:
https://app.snyk.io/org/cvat/project/c1f463ee-3776-44c4-b0fa-cd2254d0a094?utm_source=github&utm_medium=upgrade-pr

cvat-ui/package-lock.json

@@ -1854,9 +1854,9 @@
       }
     },
     "antd": {
-      "version": "3.26.19",
-      "resolved": "https://registry.npmjs.org/antd/-/antd-3.26.19.tgz",
-      "integrity": "sha512-NcSaI0jMLhdPBoTC7p9qqe8aF9Y+YHWNPNpORY98qYADvO2aXHwyRi0YUAZLauDCvDWNTfeiACBeQaFvUhXApQ==",
+      "version": "3.26.20",
+      "resolved": "https://registry.npmjs.org/antd/-/antd-3.26.20.tgz",
+      "integrity": "sha512-VIous4ofZfxFtd9K1h9MpRX2sDDpj3QcOFi3YgIc9B/uyDli/GlLb8SWKfQfJaMkaxwatIv503dag2Tog+hiEg==",
       "requires": {
         "@ant-design/create-react-context": "^0.2.4",
         "@ant-design/icons": "~2.1.1",

cvat-ui/package.json

@@ -57,7 +57,7 @@
     "@types/react-router-dom": "^5.1.6",
     "@types/react-share": "^3.0.3",
     "@types/redux-logger": "^3.0.8",
-    "antd": "^3.26.19",
+    "antd": "^3.26.20",
     "copy-to-clipboard": "^3.3.1",
     "cvat-canvas": "file:../cvat-canvas",
     "cvat-core": "file:../cvat-core",