docker-compose: add dcupd alias for detached mode start (#7144)

plugins/docker-compose/docker-compose.plugin.zsh

@@ -18,6 +18,7 @@ alias dcrm='docker-compose rm'
 alias dcr='docker-compose run'
 alias dcstop='docker-compose stop'
 alias dcup='docker-compose up'
+alias dcupd='docker-compose up -d'
 alias dcdn='docker-compose down'
 alias dcl='docker-compose logs'
 alias dclf='docker-compose logs -f'