Update OUTPUTMODES.md

Author: PitNikola

documentation/OUTPUTMODES.md

@@ -14,7 +14,8 @@ In `silent` mode the last line (if exists) will be shown in overlaying HUD toast
 
 ![silent mode](/images/screenshots/silent-mode.png)
 
-In `inline` mode, the first line of output will be directly shown in the command item and automatically refresh according to the specified `refreshTime`. Tip: Set your dashboard items as favourites via the action menu in Raycast
+In `inline` mode, the first line of output will be directly shown in the command item and automatically refresh according to the specified `refreshTime`. Tip: Set your dashboard items as favourites via the action menu in Raycast. 
+**NOTE:** `refreshTime` parameter is required for `inline` mode. When not specified, `compact` mode will be used instead.
 
 ![inline mode](/images/screenshots/inline-mode.png)