Update dependency html-webpack-plugin to v5.6.8 (#1286)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -18,7 +18,7 @@
     "autoprefixer": "10.5.4",
     "copy-webpack-plugin": "14.0.0",
     "css-loader": "7.1.4",
-    "html-webpack-plugin": "5.6.7",
+    "html-webpack-plugin": "5.6.8",
     "mini-css-extract-plugin": "2.10.2",
     "monaco-editor-webpack-plugin": "7.1.1",
     "postcss": "8.5.23",