Update dependency mini-css-extract-plugin to v2.9.1

Author: renovate[bot]

package-lock.json

@@ -25,7 +25,7 @@
     "copy-webpack-plugin": "12.0.2",
     "css-loader": "7.1.2",
     "html-webpack-plugin": "5.6.0",
-    "mini-css-extract-plugin": "2.9.0",
+    "mini-css-extract-plugin": "2.9.1",
     "monaco-editor-webpack-plugin": "7.1.0",
     "postcss": "8.4.41",
     "postcss-loader": "8.1.1",