Update dependency css-loader to v6.8.1

Author: renovate[bot]

package-lock.json

@@ -20,7 +20,7 @@
   "devDependencies": {
     "autoprefixer": "10.4.14",
     "copy-webpack-plugin": "11.0.0",
-    "css-loader": "6.7.4",
+    "css-loader": "6.8.1",
     "html-webpack-plugin": "5.5.1",
     "mini-css-extract-plugin": "2.7.6",
     "postcss": "8.4.24",