use jdk-21

Author: rssh

.github/workflows/scala.yml

@@ -21,11 +21,11 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-    - name: Set up JDK 11
+    - name: Set up JDK 21
       uses: actions/setup-java@v4
       with:
-        java-version: '11'
-        distribution: 'temurin'
+        java-version: '21'
+        distribution: 'oracle'
         cache: 'sbt'
     - name: Run tests
       run: sbt test