Update ci.yml

Author: j5ik2o

.github/workflows/ci.yml

@@ -59,5 +59,6 @@ jobs:
           distribution: 'temurin'
           java-version: ${{ matrix.jdk }}
           cache: 'sbt'
+      - uses: sbt/setup-sbt@v1    
       - name: sbt test
         run: sbt -v ++${{ matrix.scala }} test