Updates instructions on the Get started page

[kosabogi]

Overview

This PR updates the "Copy URL" section of the Elasticsearch -> Get Started page.

The related issue suggested the following wording:

• At the top of the Overview page, click on "View" next to "Connection details."
• Under the "Connection details" section, find the "Elasticsearch Endpoint" field.
• Copy the URL for the Elasticsearch Endpoint, as you will use this URL to send all Elasticsearch API requests.

In the tutorial, we guide users through the Getting Started page of the Serverless deployment, not the Overview page, so I adjusted the instructions accordingly. Additionally, I clarified that these instructions should be followed on the Getting Started page of the deployment.

Related issue

#86

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[leemthompo]

LGTM! We don't need double asterisks in asciidoc for bold text, but that's independent of this PR :)

Not sure about the build fails though...

[kosabogi]

LGTM! We don't need double asterisks in asciidoc for bold text, but that's independent of this PR :)

Not sure about the build fails though...

Thanks for the review! I'm not sure about the failure either. I thought that the ci:doc-build label might be causing it (it caused issues with other PRs), but I didn’t add it here at all. @colleenmcginnis, could you possibly help us with this, please?

[leemthompo]

I think this is on @colleenmcginnis's radar already 👍

[bmorelli25]

run docs-build

[colleenmcginnis]

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