Update DispatcherPriority.cs

src/Avalonia.Base/Threading/DispatcherPriority.cs

@@ -68,7 +68,7 @@ namespace Avalonia.Threading
         public static readonly DispatcherPriority Composition = new(Render + 1);
 
         /// <summary>
-        /// The job will be processed with the same priority as composition updates.
+        /// The job will be processed with before composition updates.
         /// </summary>
         public static readonly DispatcherPriority PreComposition = new(Composition + 1);
 
@@ -128,4 +128,4 @@ namespace Avalonia.Threading
         /// <inheritdoc />
         public int CompareTo(DispatcherPriority other) => Value.CompareTo(other.Value);
     }
-}
+}