Update README.md

Author: badosa

explorer/README.md

@@ -1,10 +1,5 @@
-The **JSON-stat Explorer** is a JSON-stat/CSV-stat/SDMX-JSON viewer developed using the [JSON-stat Javascript Toolkit](https://www.npmjs.com/package/jsonstat) and the [React library](https://reactjs.org).
+The **JSON-stat Explorer** is a JSON-stat/CSV-stat/SDMX-JSON viewer developed using the [JSON-stat Javascript Toolkit](https://www.npmjs.com/package/jsonstat-tookit) and the [React library](https://reactjs.org).
 
 You can try it at https://jsonstat.com/explorer/.
 
-To rebuild main.js from the source files use:
-
-```
-npm i
-npm run build
-```
+The latest version of this code is available at [https://github.com/jsonstat/explorer](https://github.com/jsonstat/explorer).