fix(deps): update dependency webpack-merge to v6

Author: renovate[bot]

package.json

@@ -24,7 +24,7 @@
     "sass-planifolia": "0.6.0",
     "terser-webpack-plugin": "5.3.10",
     "webpack": "5.92.1",
-    "webpack-merge": "5.10.0",
+    "webpack-merge": "6.0.1",
     "path-browserify": "1.0.1"
   },
   "devDependencies": {