Fedora Websites: Swap git repositories used for source content
This commit corresponds with the following Fedora W&A docs Pull Request:
Once the above Pull Request is merged, the updated content for the Fedora Websites & Apps team can be sourced from that repository, and the old repository may be retired. This Pull Request makes the change to Fedora's Antora config so the documentation will be served from the expected place.
Do NOT merge this Pull Request/commit before the above Pull Request is merged.
Signed-off-by: Justin W. Flory (he/him) [Fedora Project] jwf@fedoraproject.org