[docs] Add Presto SQL on Everything PDF to Overview

[steveburnett]

Description

Add the PDF "Presto: SQL on Everything" to the Overview page of the Presto documentation.

Motivation and Context

Suggested by @wanglinsong.

Impact

Documentation.

Test Plan

Local doc build, revised and tested link until it worked.

Contributor checklist

• Please make sure your submission complies with our contributing guide, in particular code style and commit standards.
• PR description addresses the issue accurately and concisely. If the change is non-trivial, a GitHub Issue is referenced.
• Documented new properties (with its default value), SQL syntax, functions, or other functionality.
• If release notes are required, they follow the release notes guidelines.
• Adequate tests were added if applicable.
• CI passed.

Release Notes

== NO RELEASE NOTE ==

[steveburnett]

Pushed trivial change to rerun test because I hope that the failed maven-checks test will succeed today.

[steveburnett]

The failed test passed on re-rerun. @tdcmeehan , when you have time please re-review.