fix sbt setup in workflow (#20447)

Author: wing328

.github/workflows/samples-scala.yaml

@@ -40,6 +40,8 @@ jobs:
         with:
           distribution: 'temurin'
           java-version: 8
+      - name: Setup sbt launcher
+        uses: sbt/setup-sbt@v1
       - name: Cache maven dependencies
         uses: actions/cache@v4
         env:

samples/client/petstore/scalaz/.openapi-generator-ignore

@@ -21,3 +21,4 @@
 #docs/*.md
 # Then explicitly reverse the ignore rule for a single file:
 #!docs/README.md
+#