Use setup-sbt action in PR checks workflow

Updated the workflow to use 'ubuntu-latest' instead of 'ubuntu-22.04' for both test and additional-checks jobs. Added caching for sbt in the setup-java step.

Author: saeltz

.github/workflows/pr-checks.yml

@@ -4,7 +4,7 @@ on:
 jobs:
   test:
     name: Test using JDK ${{matrix.java}} and Scala ${{matrix.scala}}
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
@@ -20,8 +20,10 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-java@v4
         with:
+          cache: sbt
           distribution: adopt
           java-version: ${{matrix.java}}
+      - uses: sbt/setup-sbt@v1
       - uses: actions/cache@v4
         with:
           path: ~/.cache/coursier
@@ -35,13 +37,15 @@ jobs:
       - run: sbt ++${{matrix.scala}}! test
   additional-checks:
     name: Run additional checks
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-java@v4
         with:
+          cache: sbt
           distribution: adopt
           java-version: 11
+      - uses: sbt/setup-sbt@v1
       - uses: actions/cache@v4
         with:
           path: ~/.cache/coursier