[Serverless]: Exists API links to wrong api

[larry-hernandez]

Serverless Docs

Welcome to Elastic Serverless

Description

The Exists API incorrectly links to HEAD /_index_template/{name} rather than HEAD /{index}

This is under the Ensure the data stream, index, or alias exists section of dev tools troubleshooting guide.

Resources and additional context

Correct link

• https://www.elastic.co/docs/api/doc/elasticsearch-serverless/operation/operation-indices-exists