Update kotlin version in examples

[eymar]

TODO:

imageviewer, k/wasm: webApp/build.gradle.kts' line: 62 Cannot invoke "org.gradle.api.tasks.TaskProvider.flatMap(org.gradle.api.Transformer)" because "this.optimizeTask" is null

Jetsnack iOS:

Task :common:linkDebugFrameworkIosArm64 FAILED e: Compilation failed: no implementation for FUN MISSING_DECLARATION name:shouldShowBottomBar visibility:public modality:FINAL <> () returnType:kotlin.Nothing

Jetsnack k/wasm:

Task :web:wasmJsBrowserDevelopmentRun FAILED [webpack-cli] Failed to load '/Users/Oleksandr.Karpovich/IdeaProjects/compose-multiplatform/examples/jetsnack/build/js/packages/jetsnackwasmapp/webpack.config.js' config

Widgets gallery:

• 2 failed tests on Android