Update deployment.md 错别字修改 (secretflow#1060)

错别字修改，这里应该是bob的集群已经启动

docs/getting_started/deployment.md

@@ -631,7 +631,7 @@ sf.init(address='alice ray head node address', cluster_config=cluster_config)
 ray start --head --node-ip-address="ip" --port="port" --include-dashboard=False --disable-usage-stats
 ```
 Head node starts successfully if you see "Ray runtime started." in the screen output. 
-So far, Alice's Ray cluster has been successfully built.
+So far, Bob's Ray cluster has been successfully built.
 
 
 Then `bob` initializes SecretFlow with a cluster config almost same as `alice` except for `self_party` and ray address and runs the code.