chore: repoint URLs at git.swaits.com and bump for release

Rewrites remaining github.com / git.sr.ht references to git.swaits.com,
translating GitHub URL shapes to Gitea's (/blob/<ref>/ -> /src/branch/<ref>/,
/tree/<tag> -> /src/tag/<tag>, /actions/workflows/X -> /actions?workflow=X,
/edit/ -> /_edit/).

Left pointing at GitHub on purpose: pull-request links (PRs were not migrated)
and GitHub-only surfaces Gitea lacks (security advisories, discussions).

dht-partition-healing.md

@@ -3,7 +3,7 @@
 The DHT partition-healing algorithm specification is now maintained as part
 of the `iroh-gossip-rendezvous` crate:
 
-**<https://github.com/swaits/iroh-gossip-rendezvous/blob/main/PROTOCOL.md>**
+**<https://git.swaits.com/swaits/iroh-gossip-rendezvous/src/branch/main/PROTOCOL.md>**
 
 The bridge pins a specific `iroh-gossip-rendezvous` version; the spec that
 matches whatever version you're running is in