fix

Author: lessthanoptimal

.github/workflows/gradle.yml

@@ -19,10 +19,10 @@ jobs:
       with:
         fetch-depth: 0
         submodules: true
-    - name: Set up JDK 25
+    - name: Set up JDK 21
       uses: actions/setup-java@v5
       with:
-        java-version: 25
+        java-version: 21
         distribution: 'zulu'
         cache: 'gradle'
     - name: Grant execute permission for gradlew