Update github actions (#3)

Author: jmini

.github/workflows/ci.yml

@@ -5,14 +5,15 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up JDK
-      uses: actions/setup-java@v3
+      uses: actions/setup-java@v4
       with:
-        java-version: |
-            21
         distribution: 'temurin'
+        java-version: 21
     - name: print Java version
       run: java -version
+    - name: Setup Gradle
+      uses: gradle/actions/setup-gradle@v5
     - name: Build
       run: ./gradlew clean build

.github/workflows/gradle-wrapper-validation.yml

@@ -10,4 +10,4 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: gradle/actions/wrapper-validation@v4
+      - uses: gradle/actions/wrapper-validation@v5