update README file

Author: NicosNicolaou16

.kotlin/sessions/kotlin-compiler-15147112421292548651.salive

@@ -13,7 +13,7 @@ links. It is implemented using Jetpack Compose. <br />
 Target SDK version: 35 <br />
 Minimum SDK version: 28 <br />
 Kotlin version: 2.1.10 <br />
-Gradle version: 8.8.0 <br />
+Gradle version: 8.9.0 <br />
 
 # References/Tutorials Follow