Fix typo in mqtt_sub README

diff --git a/mqtt_sub/README b/mqtt_sub/README
index ea50f66..999a2aa 100644 (file)
--- a/mqtt_sub/README
+++ b/mqtt_sub/README
@@ -39,4 +39,4 @@ multiple "clients" over an RS485 serial link.
 This protocol is decoded by the bridge example provided in host/mqtt_bridge,
 which simply transfers the MQTT part of received packets on a TCP socket
 connected to an MQTT message broker, and encapsulate MQTT packets received on
-ths socket in our simple protocol before sending them on the serial link.
+this socket in our simple protocol before sending them on the serial link.