Update typo to ack_wait for queue-worker

Signed-off-by: Alex Ellis (VMware) <[email protected]>

Author: alexellis

docs/deployment/troubleshooting.md

@@ -87,9 +87,9 @@ write_timeout: 25s
 
 ### Timeouts - Asynchronous invocations
 
-For asynchronous invocations of functions a separate timeout can be configured at the `queue-worker` level in the `ack_timeout` environmental variable.
+For asynchronous invocations of functions a separate timeout can be configured at the `queue-worker` level in the `ack_wait` environmental variable.
 
-If the `ack_timeout` is exceeded the task will not be acknowledge and the queue system will retry the invocation.
+If the `ack_wait` is exceeded the task will not be acknowledge and the queue system will retry the invocation.
 
 ## Function execution logs