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

Author: renovate[bot]

package.json

@@ -66,7 +66,7 @@
     "jest-resolve": "24.9.0",
     "jest-watch-typeahead": "0.4.0",
     "mini-css-extract-plugin": "0.8.0",
-    "optimize-css-assets-webpack-plugin": "5.0.3",
+    "optimize-css-assets-webpack-plugin": "5.0.8",
     "pnp-webpack-plugin": "1.5.0",
     "postcss-flexbugs-fixes": "4.1.0",
     "postcss-loader": "3.0.0",