Update dependency optimize-css-assets-webpack-plugin to v5.0.8

Author: renovate-bot

frontend/package.json

@@ -39,7 +39,7 @@
     "jest-watch-typeahead": "0.4.2",
     "jquery": "^3.5.1",
     "mini-css-extract-plugin": "0.9.0",
-    "optimize-css-assets-webpack-plugin": "5.0.3",
+    "optimize-css-assets-webpack-plugin": "5.0.8",
     "pnp-webpack-plugin": "1.6.4",
     "postcss-flexbugs-fixes": "4.1.0",
     "postcss-loader": "3.0.0",