Updated index.md

Updated index.md to add aws-elastic-beanstalk-service content

Author: VarshaRagavendran

content/actions/how-tos/deploy/deploy-to-third-party-platforms/index.md

@@ -23,6 +23,7 @@ children:
   - /azure-static-web-app
   - /azure-kubernetes-service
   - /amazon-elastic-container-service
+  - /aws-elastic-beanstalk-service
   - /google-kubernetes-engine
   - /sign-xcode-applications
 ---