Bump java version in workflows and jitpack

.github/workflows/gradle.yml

@@ -11,12 +11,12 @@ jobs:
         os: ["ubuntu-latest", "windows-latest"]
     runs-on: "${{ matrix.os }}"
     steps:
-      - uses: actions/checkout@v2
-      - uses: gradle/wrapper-validation[email protected]
-      - name: Set up JDK 17
-        uses: actions/setup-java@v2
+      - uses: actions/checkout@v4
+      - uses: gradle/actions/wrapper-validation@v3
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'zulu'
           cache: 'gradle'
       - name: Build with Gradle

jitpack.yml

@@ -1,6 +1,6 @@
 before_install:
   - sdk update
-  - sdk install java 17.0.9-tem
-  - sdk use java 17.0.9-tem
+  - sdk install java 21.0.3-tem
+  - sdk use java 21.0.3-tem
 install:
   - ./gradlew build publishToMavenLocal