Add new sample webclient-jackson3 to github workflow

Author: robinmarechal

.github/workflows/samples-java-client-jdk17.yaml

@@ -40,6 +40,7 @@ jobs:
           - samples/client/others/java/webclient-sealedInterface
           - samples/client/others/java/webclient-sealedInterface_3_1
           - samples/client/petstore/java/webclient-useSingleRequestParameter
+          - samples/client/petstore/java/webclient-jackson3
           - samples/client/others/java/restclient-enum-in-multipart
     steps:
       - uses: actions/checkout@v5