Point links at git.coffeylabs.org after the move from GitHub

GitHub took the organization's repos and GHCR offline on 2026-09-20. Repo,
release, raw-file and clone links now go to Gitea at git.coffeylabs.org,
container images to registry.coffeylabs.org, and GitLab-style /-/blob paths
to Gitea's /src/branch form. Go module paths are identifiers and stay as
they are; links to GitHub issues and pull requests are left as history.

SECURITY.md

@@ -32,6 +32,6 @@ session.
 
 You'll get an acknowledgement within a few days. A report that turns out to
 affect the mail server rather than this interface will be moved to
-[inbuxa-server](https://github.com/inbuxa/inbuxa-server), and one that affects
+[inbuxa-server](https://git.coffeylabs.org/inbuxa/inbuxa-server), and one that affects
 upstream Stalwart's web interface will be passed to Stalwart Labs with credit
 to you.

src/lib/sourceDownload.ts

@@ -11,4 +11,4 @@
  * this fork. The version shown beside the link names the build, which is what
  * makes the offer something a person can act on.
  */
-export const SOURCE_URL = 'https://github.com/inbuxa/inbuxa-admin';
+export const SOURCE_URL = 'https://git.coffeylabs.org/inbuxa/inbuxa-admin';