Doc OpenTTD#7181: AAT_STATION_AIRPLANE_LAND triggers only a single ti…

…le, not all airport tiles. (OpenTTD#7182)

src/newgrf_animation_type.h

@@ -51,7 +51,7 @@ enum AirpAnimationTrigger {
 	AAT_STATION_NEW_CARGO,       ///< Triggered when new cargo arrives at the station (for all tiles at the same time).
 	AAT_STATION_CARGO_TAKEN,     ///< Triggered when a cargo type is completely removed from the station (for all tiles at the same time).
 	AAT_STATION_250_TICKS,       ///< Triggered every 250 ticks (for all tiles at the same time).
-	AAT_STATION_AIRPLANE_LAND,   ///< Triggered when an airplane (not a helicopter) touches down at the airport (for all tiles at the same time).
+	AAT_STATION_AIRPLANE_LAND,   ///< Triggered when an airplane (not a helicopter) touches down at the airport (for single tile).
 };
 
 /** Animation triggers for objects. */