docs: fixing incorrect link

Author: ScriptedAlchemy

src/plugin-options.json

@@ -15,7 +15,7 @@
       "type": "boolean"
     },
     "insert": {
-      "description": "Inserts `<link>` at the given position (https://github.com/faceyspacey/extract-css-chunks-webpack-pluginn#insert).",
+      "description": "Inserts `<link>` at the given position (https://github.com/webpack-contrib/mini-css-extract-plugin#insert).",
       "instanceof": "Function"
     }
   }