chore(ci): Mitigate ubuntu-latest changes (#208)

Author: Johnnei

.github/workflows/pr-checks.yml

@@ -17,6 +17,7 @@ jobs:
         with:
           distribution: adopt
           java-version: 8
+      - uses: sbt/setup-sbt@v1
       - uses: actions/cache@v4
         with:
           path: ~/.ivy2/cache

.github/workflows/release.yml

@@ -14,6 +14,7 @@ jobs:
         with:
           distribution: adopt
           java-version: 8
+      - uses: sbt/setup-sbt@v1
       - run: sbt ci-release
         env:
           PGP_PASSPHRASE: ${{ secrets.PGP_PASSPHRASE }}