Using setup-java and setup-gradle.

.gitea/workflows/gitea-ci.yml

@@ -11,6 +11,13 @@ jobs:
     steps:
       - name: Checkout the code.
         uses: actions/checkout@v4
+      - name: Setup Java.
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 21
+      - name: Setup Gradle.
+        uses: gradle/actions/setup-gradle@v4
       - name: Check libraries.
         run: ./gradlew check
       - name: Publish to git.jessebrault.com.