Add task description update (addresses #237 )

content/v2.0/process-data/manage-tasks/update-task.md

@@ -31,7 +31,9 @@ In the list of tasks, click the {{< icon "toggle" >}} toggle to the left of the
 task you want to activate or inactivate.
 
 #### Update a task's description
-1. In the list of tasks, click the task you want to update.
+1. In the list of tasks, hover over the name of the task you want to update.
+2. Click the pencil icon {{< icon "pencil" >}}.
+3. Click outside of the field or press `RETURN` to update.
 
 ## Update a task with the influx CLI
 Use the `influx task update` command to update or change the status of an existing task.