Add preferred quality note

Add the preferred quality note from the Radarr page (amended to say Sonarr)

docs/Sonarr/Sonarr-Quality-Settings-File-Size.md

@@ -80,4 +80,11 @@ I only do WEB-DL myself for TV shows because in my opinion WEB-DL is the sweet s
 | {{ sonarr['quality-size']['anime']['qualities'][17]['quality'] }} | {{ sonarr['quality-size']['anime']['qualities'][17]['min'] }} | {{ sonarr['quality-size']['anime']['qualities'][17]['max'] }} |
 | {{ sonarr['quality-size']['anime']['qualities'][18]['quality'] }} | {{ sonarr['quality-size']['anime']['qualities'][18]['min'] }} | {{ sonarr['quality-size']['anime']['qualities'][18]['max'] }} |
 
+!!! note
+    The reason why you don't see the `Preferred` score in the table above is because we want max quality anyway. So set it as high as possible.
+
+    The highest preferred quality you can manually enter is 1 less than the Maximum quality. If you use the slider, the preferred quality can be up to 5 lesser than the Maximum quality.
+
+    Make sure you have enabled 'Show Advanced' in Sonarr, if you don't see a provision to enter the scores, under the Quality settings.
+
 --8<-- "includes/support.md"