Update example variable naming

Author: pmeinhardt

examples/stream.exs

@@ -2,7 +2,7 @@
 
 {:ok, conn} = SSHKit.connect("127.0.0.1", port: 2222, user: "deploy", password: "deploy", silently_accept_hosts: true)
 
-{:ok, chan} = SSHKit.run(conn, ~S(echo "Who's there?"; read msg; echo "Hello $msg!"))
+{:ok, chan} = SSHKit.run(conn, ~S(echo "Who's there?"; read name; echo "Hello $name"))
 
 IO.write("> ")