add samples to the github workflow

Author: stefanddamian

.github/workflows/samples-java-client-jdk11.yaml

@@ -24,6 +24,7 @@ on:
       - samples/client/others/java/apache-httpclient/**
       - samples/client/others/java/resttemplate-list-schema-validation/**
       - samples/client/petstore/java/okhttp-gson-3.1-duplicated-operationid/**
+      - samples/client/others/java/restclient-sealedInterface/**
   pull_request:
     paths:
       - 'samples/client/petstore/java/**'
@@ -47,6 +48,7 @@ on:
       - samples/client/others/java/apache-httpclient/**
       - samples/client/others/java/resttemplate-list-schema-validation/**
       - samples/client/petstore/java/okhttp-gson-3.1-duplicated-operationid/**
+      - samples/client/others/java/restclient-sealedInterface/**
 jobs:
   build:
     name: Build Java Client JDK11