[MINOR][DOCS] Tighten up some key links to the project and download pages to use HTTPS

## What changes were proposed in this pull request?

Tighten up some key links to the project and download pages to use HTTPS

## How was this patch tested?

N/A

Closes #24665 from srowen/HTTPSURLs.

Authored-by: Sean Owen <sean.owen@databricks.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>