fix CI for latest ubuntu-latest

Author: SethTisue

.github/workflows/release.yml

@@ -15,6 +15,7 @@ jobs:
           distribution: temurin
           java-version: 8
           cache: sbt
+      - uses: sbt/setup-sbt@v1
       - run: sbt ci-release
         env:
           PGP_PASSPHRASE: ${{ secrets.PGP_PASSPHRASE }}

.github/workflows/validate.yml

@@ -36,6 +36,9 @@ jobs:
           distribution: temurin
           java-version: ${{matrix.java}}
 
+      - name: Set up sbt
+        uses: sbt/setup-sbt@v1
+
       - name: Cache Coursier cache
         uses: coursier/cache-action@v6