fix: java 23 in actions

Author: mworzala

.github/workflows/build-core.yaml

@@ -15,10 +15,10 @@ jobs:
       GPG_PASSPHRASE: ${{ secrets.GPG_PASSWORD }}
     steps:
       - uses: actions/checkout@v4
-      - name: Set up JDK 21 (for JNI)
+      - name: Set up JDK 23 (for JNI)
         uses: actions/setup-java@v4
         with:
-          java-version: '21'
+          java-version: '23'
           distribution: 'temurin'
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v3

.github/workflows/build-natives.yaml

@@ -26,10 +26,10 @@ jobs:
       - uses: actions/checkout@v4
         with:
           submodules: recursive
-      - name: Set up JDK 21 (for JNI)
+      - name: Set up JDK 23 (for JNI)
         uses: actions/setup-java@v4
         with:
-          java-version: '21'
+          java-version: '23'
           distribution: 'temurin'
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v3