Update README.md

Author: lmc999

README.md

@@ -137,7 +137,7 @@ bash <(curl -L -s check.unlock.media) -E
 
 **或者直接运行以下Docker命令** (兼容ARM架构)
 ````docker
-docker run --rm -ti --net=host lmc999/regioncheck && docker rmi lmc999/regioncheck
+docker run --rm -ti --net=host lmc999/regioncheck && docker rmi lmc999/regioncheck > /dev/null 2>&1
 ````
 
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