llama.swiftui : fix xcframework dir in README [no ci] (#12353)

This commit fixes the path to the xcframework in the README file which I
had forgotten to change after renaming the build directory.

Author: danbev

examples/llama.swiftui/README.md

@@ -16,7 +16,7 @@ Open `llama.swiftui.xcodeproj` project in Xcode and you should be able to build
 a simulator or a real device.
 
 To use the framework with a different project, the XCFramework can be added to the project by
-adding `build-ios/llama.xcframework` by dragging and dropping it into the project navigator, or
+adding `build-apple/llama.xcframework` by dragging and dropping it into the project navigator, or
 by manually selecting the framework in the "Frameworks, Libraries, and Embedded Content" section
 of the project settings.