Update deploy docs for the Gitea Actions migration

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

README.md

@@ -46,12 +46,21 @@ npm run preview
 
 ## Deploy
 
-`.gitlab-ci.yml` at the repo root builds/deploys each site independently
-(path-scoped via `rules: changes:`), plus a `deploy:shared` job that syncs
-`shared/images/` and `shared/footer.html` to
-`/var/www/domains/gateway-gamers.net/shared/` on the webserver — the box
-the GitLab Runner executes on. Every site's nginx server block points
-`/images/` and `/footer.html` at that shared directory via `alias`, so the
-webserver only ever holds one copy of the ~25MB of images. See each
+`.gitea/workflows/` at the repo root builds/deploys each site independently
+(one workflow per site, path-triggered via `on.push.paths`), plus a
+`deploy-shared.yml` workflow that syncs `shared/images/` and
+`shared/footer.html` to `/var/www/domains/gateway-gamers.net/shared/` on
+the webserver — the box the Gitea Actions runner (`act_runner`, host mode,
+no Docker) executes on. Every site's nginx server block points `/images/`
+and `/footer.html` at that shared directory via `alias`, so the webserver
+only ever holds one copy of the ~25MB of images. See each
 `sites/<name>/<name>.gateway-gamers.net.conf` for the live nginx reference
 config (applied manually on the box — CI doesn't touch nginx).
+
+A separate `refresh-elo.yml` workflow runs weekly (~02:00 UTC) to refresh
+`40k-rankings`' stat-check ELO data and push the result back to `main`,
+authenticating via the `SYNC_ACCESS_TOKEN` repo secret.
+
+This previously ran on self-hosted GitLab CI (`.gitlab-ci.yml`); that
+GitLab instance was migrated to Gitea, so the pipeline was ported to
+Gitea Actions accordingly.