fix github actions

.github/workflows/deploy-website.yaml

@@ -25,10 +25,7 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-      - uses: actions/setup-java@v3
-        with:
-          distribution: 'zulu'
-          java-version: '21'
+      - run: apk add openjdk21
       - run: ./gradlew :kotlite-apidoc:generateStdlibApiDoc :kotlite-demo:assemble
       - run: cd doc && asciidoctor -r asciidoctor-diagram -D "/wd/doc/output" /wd/doc/usermanual/index.adoc
       - run: cp -R usermanual/img output/img

README.md

@@ -9,6 +9,7 @@ _A lite embedded Kotlin interpreter_
 ![macOS](https://img.shields.io/badge/macOS-blue)
 ![watchOS](https://img.shields.io/badge/watchOS-blue)
 ![tvOS](https://img.shields.io/badge/tvOS-blue)
+![Verification Test Status](https://github.com/sunny-chung/kotlite/actions/workflows/run-test.yaml/badge.svg?branch=main)
 
 **Kotlite** is an open-sourced type-safe programming language that has a rich subset of the [Kotlin](https://kotlinlang.org/) script language. It comes with standard libraries, which are a subset of Kotlin Multiplatform/Common standard libraries and a few third-party libraries.
 
@@ -55,6 +56,8 @@ val symbolTable = interpreter.symbolTable()
 val a = (symbolTable.findPropertyByDeclaredName("a") as LongValue).value // 4181L
 ```
 
+The interpreter is well tested.
+
 ![Well tested](./doc/usermanual/img/tests.png)
 
 ## Demo