Update introduction.mdx

I kept getting a `TypeError i is undefined` with the umd version of the script from unpkg. I finally found issue #92 and someone suggested using a different version on unpkg. I tried that and my error was resolved so I made that change in the docs.

docs/introduction.mdx

@@ -47,8 +47,8 @@ Include the CSS file in the `head` section of your page:
 Include the JavaScript file before the closing `body` tag, if you're using it with the leaflet, make sure to include it **after** leaflet's javascript file
 
 ```html
-<!-- Make sure you put this AFtER leaflet.js, when using with leaflet -->
-<script src="https://unpkg.com/leaflet-geosearch@3.0.0/dist/geosearch.umd.js"></script>
+<!-- Make sure you put this AFTER leaflet.js, when using with leaflet -->
+<script src="https://unpkg.com/leaflet-geosearch@latest/dist/bundle.min.js"></script>
 ```
 
 Now you're ready to use the control or providers. Just remember that your "import" syntax will be a bit different from what the docs are using.