Fixed inverted readonly setting for MemoryStream

Author: Sergio0694

Microsoft.Toolkit.HighPerformance/Extensions/MemoryExtensions.cs

@@ -30,7 +30,7 @@ public static class MemoryExtensions
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static Stream AsStream(this Memory<byte> memory)
         {
-            return MemoryStream.Create(memory, true);
+            return MemoryStream.Create(memory, false);
         }
     }
 }

Microsoft.Toolkit.HighPerformance/Extensions/ReadOnlyMemoryExtensions.cs

@@ -28,7 +28,7 @@ public static class ReadOnlyMemoryExtensions
         [Pure]
         public static Stream AsStream(this ReadOnlyMemory<byte> memory)
         {
-            return MemoryStream.Create(memory, false);
+            return MemoryStream.Create(memory, true);
         }
     }
 }