Amend Dead Link

Author: jason-fox

README.md

@@ -21,7 +21,7 @@ The tutorial uses [cUrl](https://ec.haxx.se/) commands throughout, but is also a
 [Postman documentation](https://fiware.github.io/tutorials.Getting-Started/ngsi-ld.html)
 
 [![Run in Postman](https://run.pstmn.io/button.svg)](https://app.getpostman.com/run-collection/610b7cd32e4b07b8e9c9)
-[![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/FIWARE/tutorials.Getting-Started/tree/NGSI-LD)
+[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://github.com/codespaces/new?repo=FIWARE/tutorials.Getting-Started&ref=NGSI-LD)
 
 -   このチュートリアルは[日本語](README.ja.md)でもご覧いただけます。