Modify link of install Elasticsearch

[y-vectorfield]

Link of install.asciidoc is not correct. I modified this link.

[cbuescher]

Looking at the version of this page on master that is online, the link works for me and is pointing to https://www.elastic.co/guide/en/elasticsearch/reference/master/install-elasticsearch.html.
Would you mind sharing what you are seeing? I think the link is correct as is.

[elasticmachine]

Pinging @elastic/es-docs (:Docs)

[elasticmachine]

Pinging @elastic/es-core-infra (:Core/Infra/Packaging)

[y-vectorfield]

@cbuescher
Thank you very much for your comment. I'm sorry, this modify arose from my misunderstanding.
I am going to close this pull request.

By the way, I have a question. Why do you use {es} attribution of asciidoc in reference/setup/install.asciidoc? If it is necessary to modify, I am going to submit a pull request.

[cbuescher]

Why do you use {es} attribution of asciidoc in reference/setup/install.asciidoc

Thanks for asking, to be honest I don't know but @jrodewig might have an answer to that. I don't think it needs changing though.

[jrodewig]

Hi @y-vectorfield!

The {es} attribute expands to Elasticsearch in our final HTML output. We maintain a similar list of common and branded terms here:
https://github.com/elastic/docs/blob/master/shared/attributes.asciidoc#L88

We use attributes to stay DRY and consistent if we change a product name in the future. Updating the expanded term in a single place makes that much easier. It also reduces the likelihood of typos and misspellings.

[y-vectorfield]

Hello, @jrodewig ,
Thank you very much for your comments and useful information.