DOC: fix link redirect and correct spelling of Info-ZIP

[partev]

Documentation

Download the documentation page links to http://www.info-zip.org/ which then redirects to the correct homepage https://infozip.sourceforge.net/ for Info-ZIP.

Also, "InfoZIP" should be spelled as "Info-ZIP".

zipfile uses correct spelling for "Info-ZIP" and correct URL for its homepage: https://infozip.sourceforge.net/

Linked PRs

• gh-111625: Fix link to Info-ZIP homepage #111626
• [3.12] gh-111625: Fix link to Info-ZIP homepage (GH-111626) #111639
• [3.11] gh-111625: Fix link to Info-ZIP homepage (GH-111626) #111640