[Snyk] Upgrade dotenv-webpack from 7.1.1 to 8.0.0 (#98)

feat: upgrade dotenv-webpack from 7.1.1 to 8.0.0

Snyk has created this PR to upgrade dotenv-webpack from 7.1.1 to 8.0.0.

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

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

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

cvat-ui/package.json

@@ -38,7 +38,7 @@
     "cvat-canvas": "file:../cvat-canvas",
     "cvat-canvas3d": "file:../cvat-canvas3d",
     "cvat-core": "file:../cvat-core",
-    "dotenv-webpack": "^7.1.0",
+    "dotenv-webpack": "^8.0.0",
     "error-stack-parser": "^2.0.6",
     "lodash": "^4.17.21",
     "moment": "^2.29.2",