Fix Australian parental rating system (#10006)

Emby.Server.Implementations/Localization/Ratings/au.csv

@@ -4,10 +4,14 @@ G,0
 M,15
 MA,15
 MA15+,15
+MA 15+,15
 PG,16
 16+,16
 R,18
 R18+,18
-X18+,18
+R 18+,18
 18+,18
+X18+,1000
+X 18+,1000
 X,1000
+RC,1001