Updated README.md

Author: StefanOltmann

README.md

@@ -1,6 +1,6 @@
 # EXIF Viewer
 
-[![Kotlin](https://img.shields.io/badge/kotlin-2.0.20-blue.svg?logo=kotlin)](httpw://kotlinlang.org)
+[![Kotlin](https://img.shields.io/badge/kotlin-2.0.21-blue.svg?logo=kotlin)](httpw://kotlinlang.org)
 ![WASM](https://img.shields.io/badge/-WASM-gray.svg?style=flat)
 
 Web-based EXIF viewer built to view photo EXIF data details from