Update pages/docs/tutorials/kafka/bindings-with-kafka.md

the url must be the base path of the registry api
the $ref must referencing a component or an external file, so this is not appropriate here.

Co-authored-by: Ludovic Dussart <[email protected]>

pages/docs/tutorials/kafka/bindings-with-kafka.md

@@ -31,7 +31,7 @@ servers:
   production:
     bindings:
       kafka:
-        schemaRegistryUrl: '$ref: http://localhost:8080/apis/registry/v2/groups/my-group/artifacts/UserSignedUp'
+        schemaRegistryUrl: 'http://localhost:8080/apis/registry/'
         schemaRegistryVendor: 'apicurio'
         bindingVersion: '0.4.0'
 ```