Use JVM 21 for CLJS

Author: borkdude

.github/workflows/build.yml

@@ -20,7 +20,7 @@ jobs:
          uses: actions/setup-java@v3
          with:
           distribution: 'temurin'
-          java-version: '8'
+          java-version: '21'
 
        - name: Install clojure tools
          uses: DeLaGuardo/[email protected]