Add exceptions to external link tests
As part of Docs project maintenance tasks, March 2023 (technical-writing#773 - closed), I ran the external link test, and there's a huge number of failures for https://www.facebook.com/gitlab
with too many redirects
. The link works fine in a browser.
This MR also adds some more similar URLs.
Edited by Marcin Sedlak-Jakubowski