switch back to scala, run a 'scala -e ...' command during setup

Author: hcannoodt

.github/workflows/sbt_test.yml

@@ -53,7 +53,10 @@ jobs:
     - name: Set up Scala (via Coursier)
       uses: coursier/setup-action@v2
       with:
-        apps: scala3
+        apps: scala
+
+    - name: Warm up scala
+      run: scala -e 'println("Hello, Scala!")'
 
     - name: Set up .NET SDK
       if: ${{ runner.os == 'Linux' }}