Fix spelling error in comment
@@ -683,7 +683,7 @@ typedef struct IotMqttConnectInfo
* @ingroup mqtt_datatypes_paramstructs
* @brief Function pointers for MQTT packet serializer overrides.
*
- * These funciton pointers allow the MQTT serialization and deserialization functions
+ * These function pointers allow the MQTT serialization and deserialization functions
* to be overridden for an MQTT connection. The compile-time setting
* @ref IOT_MQTT_ENABLE_SERIALIZER_OVERRIDES must be `1` to enable this functionality.
* See the #IotMqttSerializer_t::serialize and #IotMqttSerializer_t::deserialize
