Update ci.yml

Author: xuwei-k

.github/workflows/ci.yml

@@ -18,6 +18,7 @@ jobs:
         distribution: temurin
     - uses: actions/checkout@v4
     - uses: coursier/cache-action@v6
+    - uses: sbt/setup-sbt@v1
     - run: sbt -v compile paradox
     - run: sudo apt-get install tree
     - run: tree target