fix: add container_name to act_runner to bypass podman-compose naming bug

https://claude.ai/code/session_01FKCW3FDjNFj6jve4niMFXH

infra/docker-compose.yml

@@ -107,6 +107,7 @@ services:
   #   Site Administration → Actions → Runners → Create new runner
   act_runner:
     image: code.forgejo.org/forgejo/act_runner:latest
+    container_name: act_runner
     restart: unless-stopped
     environment:
       FORGEJO_INSTANCE_URL: https://${FORGEJO_DOMAIN}