Metal iOS xcode26.1 b1

#Metal.framework https://github.com/dotnet/macios/pull/23901

diff -ruN /Applications/Xcode_26.0.1.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/Metal.framework/Headers/MTLLibrary.h /Applications/Xcode_26.1.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/Metal.framework/Headers/MTLLibrary.h
--- /Applications/Xcode_26.0.1.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/Metal.framework/Headers/MTLLibrary.h	2025-08-02 19:54:07
+++ /Applications/Xcode_26.1.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/Metal.framework/Headers/MTLLibrary.h	2025-09-05 16:55:41
@@ -414,6 +414,9 @@
 /// Provides a list of inputs and outputs of the function.
 @property (nonnull, readonly) NSArray<id<MTLBinding>> *bindings;
 
+/// The string passed to the user annotation attribute for this function. Null if no user annotation is present for this function.
+@property (nullable, readonly) NSString *userAnnotation API_AVAILABLE(macos(26.0), ios(26.0));
+
 @end
 
 /*!