fix typo. (#365)

Author: senmm

documents/FAQ.md

@@ -9,7 +9,7 @@ If you are just getting started make sure you [install this sdk](https://github.
 ``` python
 io.init_logging(io.LogLevel.Error, 'stderr')
 ```
-You can also enable [CloudWatch logging](https://docs.aws.amazon.com/iot/latest/developerguide/cloud-watch-logs.html) for IoT which will provide you with additional information that is not avaible on the client side sdk.
+You can also enable [CloudWatch logging](https://docs.aws.amazon.com/iot/latest/developerguide/cloud-watch-logs.html) for IoT which will provide you with additional information that is not available on the client side sdk.
 
 ### I keep getting AWS_ERROR_MQTT_UNEXPECTED_HANGUP