Bump README Xcode badge from 26.2 to 26.3

Author: backslash-f

README.md

@@ -1,5 +1,5 @@
 [![Swift](https://img.shields.io/badge/Swift-6.2-ea7a50.svg?logo=swift&logoColor=white)](https://developer.apple.com/swift/)
-[![Xcode](https://img.shields.io/badge/Xcode-26.2-50ace8.svg?logo=xcode&logoColor=white)](https://developer.apple.com/xcode/)
+[![Xcode](https://img.shields.io/badge/Xcode-26.3-50ace8.svg?logo=xcode&logoColor=white)](https://developer.apple.com/xcode/)
 [![SPM](https://img.shields.io/badge/SPM-ready-b68f6a.svg?logo=gitlfs&logoColor=white)](https://developer.apple.com/documentation/xcode/swift-packages)
 [![Platforms](https://img.shields.io/badge/Platforms-iOS%2018+%20%7C%20macOS%2015+%20-lightgrey.svg?logo=apple&logoColor=white)](https://en.wikipedia.org/wiki/List_of_Apple_operating_systems)
 [![DocC](https://img.shields.io/badge/DocC-documentation-0288D1.svg?logo=bookstack&logoColor=white)](https://thatfactory.github.io/extensions/documentation/extensions/)