UI text: fix capitalization

Change-Id: Idcad814afc9e12256821106ee3272391ad95c8ef
Reviewed-by: Christian Kandeler <christian.kandeler@digia.com>

src/libs/ssh/sftpchannel.cpp

@@ -272,7 +272,7 @@ void SftpChannelPrivate::handleChannelFailure()
         throw SSH_SERVER_EXCEPTION(SSH_DISCONNECT_PROTOCOL_ERROR,
             "Unexpected SSH_MSG_CHANNEL_FAILURE packet.");
     }
-    emit initializationFailed(tr("Server could not start sftp subsystem."));
+    emit initializationFailed(tr("Server could not start SFTP subsystem."));
     closeChannel();
 }