[Serverless]: Create API Key UI states that No Expiration is a Default

[davedenscombe]

Serverless Docs

Elasticsearch

Description

Go to the "Getting Started with Elasticsearch" homepage, then scroll down to the "Add an API Key" section. Click +New. The screen shown has "Apply expiration date" enabled, but the text immediately beneath it states "Setting an expiration date is a security best practice. Defaults to no expiration."

This is contradictory as it defaulted to having an expiration.

Resources and additional context

Found during the Serverless Bugbash but the issue is about the UI.

[shainaraskas]

probably should be transferred to a dev team ... not sure which repo