fix CI for latest ubuntu-latest

Author: SethTisue

.github/workflows/ci.yml

@@ -21,6 +21,7 @@ jobs:
       with:
         distribution: temurin
         java-version: ${{matrix.java}}
+    - uses: sbt/setup-sbt@v1
     - name: Test
       run: |
          sbt ++${{matrix.scala}} test

.github/workflows/release.yml

@@ -13,6 +13,7 @@ jobs:
         with:
           distribution: temurin
           java-version: 8
+      - uses: sbt/setup-sbt@v1
       - run: sbt ci-release
         env:
           PGP_PASSPHRASE: ${{secrets.PGP_PASSPHRASE}}