PencilKit macOS xcode15.3 b1

#PencilKit.framework https://github.com/xamarin/xamarin-macios/pull/20780

diff -ruN /Applications/Xcode_15.2.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/PencilKit.framework/Headers/PKContentVersion.h /Applications/Xcode_15.3.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/PencilKit.framework/Headers/PKContentVersion.h
--- /Applications/Xcode_15.2.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/PencilKit.framework/Headers/PKContentVersion.h	2023-11-12 04:29:34
+++ /Applications/Xcode_15.3.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/PencilKit.framework/Headers/PKContentVersion.h	2024-01-10 02:37:22
@@ -19,6 +19,10 @@
     ///
     /// Inks included are Pen, Pencil, Marker, Monoline, Fountain Pen, Watercolor, and Crayon.
     PKContentVersion2 NS_SWIFT_NAME(version2),
+    
+    /// New Fountain Pen
+    PKContentVersion3 NS_SWIFT_NAME(version3),
+
     /// The latest version including all features.
-    PKContentVersionLatest = PKContentVersion2
+    PKContentVersionLatest = PKContentVersion3
 };