MIgrate to newer gradle sdk setting

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

app/build.gradle

@@ -35,7 +35,7 @@ apply plugin: "org.jlleitschuh.gradle.ktlint"
 apply plugin: 'kotlinx-serialization'
 
 android {
-    compileSdkVersion 33
+    compileSdk 33
 
     namespace 'com.nextcloud.talk'