feat: upgrade dotenv-webpack from 7.1.1 to 8.0.1 (#5129)

Snyk has created this PR to upgrade dotenv-webpack from 7.1.1 to 8.0.1.

See this package in npm:
https://www.npmjs.com/package/dotenv-webpack

See this project in Snyk:
https://app.snyk.io/org/cvat/project/c4d6d89a-2ea0-41d8-84c7-118edb6061e2?utm_source=github&utm_medium=referral&page=upgrade-pr

Co-authored-by: snyk-bot <snyk-bot@snyk.io>

cvat-ui/package.json

@@ -38,7 +38,7 @@
     "cvat-canvas": "link:./../cvat-canvas",
     "cvat-canvas3d": "link:./../cvat-canvas3d",
     "cvat-core": "link:./../cvat-core",
-    "dotenv-webpack": "^7.1.0",
+    "dotenv-webpack": "^8.0.1",
     "error-stack-parser": "^2.0.6",
     "lodash": "^4.17.21",
     "moment": "^2.29.2",