fix img alts

Signed-off-by: Julien Veyssier <[email protected]>

docs/user/README.md

@@ -14,25 +14,25 @@ To run a task with the Assistant, just open it via the top menu entry (on the to
 Then choose a task type at the top of the assistant.
 Then fill up the input form and press the submit button at the bottom right.
 
-![top right icon](../img/assistant.png)
+![assistant](../img/assistant.png)
 
 You task will run immediately if possible or be scheduled for later execution.
 
-![top right icon](../img/getting.results.png)
+![getting results](../img/getting.results.png)
 
-![top right icon](../img/scheduled.png)
+![scheduled](../img/scheduled.png)
 
 ## Notifications
 
 If it is scheduled, you will receive a notification when it has finished.
 You can display the task results by clicking the "View results" button in the notification.
 
-![top right icon](../img/notifications.png)
+![notifications](../img/notifications.png)
 
 ## History
 
 On the bottom left corner of the assistant, there is a button display the task history.
 This task history is filtered to only show tasks of the selected task type.
 You can then relaunch previous tasks, delete them or just cancel them if they were scheduled.
 
-![top right icon](../img/history.png)
+![task history](../img/history.png)