ci: add new samples directory

Author: plaflamme

.github/workflows/samples-scala-client.yaml

@@ -11,6 +11,7 @@ on:
       - samples/client/petstore/scala-sttp/**
       - samples/client/petstore/scala-sttp-circe/**
       - samples/client/petstore/scala-sttp4/**
+      - samples/client/petstore/scala-sttp4-circe/**
   pull_request:
     paths:
       - samples/client/petstore/scalaz/**
@@ -21,6 +22,7 @@ on:
       - samples/client/petstore/scala-sttp/**
       - samples/client/petstore/scala-sttp-circe/**
       - samples/client/petstore/scala-sttp4/**
+      - samples/client/petstore/scala-sttp4-circe/**
 jobs:
   build:
     name: Build sbt/Scala
@@ -38,6 +40,7 @@ jobs:
           - samples/client/petstore/scala-sttp
           - samples/client/petstore/scala-sttp-circe
           - samples/client/petstore/scala-sttp4
+          - samples/client/petstore/scala-sttp4-circe
     services:
       petstore-api:
         image: swaggerapi/petstore