Update playgrounds/geo-javascript/README.md

Co-authored-by: cvermand <[email protected]>

Author: CaroFG

playgrounds/geo-javascript/README.md

@@ -1,6 +1,8 @@
 # Javascript GeoSearch Playground
 
-The provided Google Maps Api Key is limited at 300 requests per day, so it might be down sometimes. In which case, please create a new [Google Api Key](https://developers.google.com/maps/documentation/javascript/get-api-key) and add it in the `.env` file at the root of the playground: `/playgrounds/geo-javascript`
+The provided Google Maps API Key is limited to 300 requests per day, so it might be down sometimes. In which case, please create a new [Google API Key](https://developers.google.com/maps/documentation/javascript/get-api-key) and add it in the `.env` file at the root of the playground: `/playgrounds/geo-javascript`.
+
+The same dataset is [downloadable here](https://github.com/meilisearch/datasets/tree/main/datasets/world_cities) if you want to try it out on your own MeiliSearch.
 
 ## Project setup