Update Drawable.swift

Author: MaxDesiatov

WebGPUDemo/Sources/Drawable.swift

@@ -1,6 +1,6 @@
 //===----------------------------------------------------------------------===//
 //
-// This source file is part of the Swift.org open source project
+// This source file is part of the Swift open source project
 //
 // Copyright (c) 2025 Apple Inc. and the Swift project authors
 // Licensed under Apache License v2.0 with Runtime Library Exception