ci: re-trigger build (previous run interrupted by host overload)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitea/workflows/build.yaml

@@ -7,6 +7,7 @@ name: build-and-push
 # (ingen insecure-registry-config behövs där).
 #
 # Pull:a på Pi5 med  localhost:5000/archivum:latest  (t.ex. i dockge-stacken).
+# rebuild trigger: 2 (previous run was interrupted by a host overload)
 on:
   push:
     branches: [main, master]