fix: use service discovery interface (1/n)

examples/custom_backend/hello_world/client.py

@@ -24,7 +24,7 @@
 async def worker(runtime: DistributedRuntime):
     # Get endpoint
     endpoint = (
-        runtime.namespace("hello_world").component("backend").endpoint("generate")
+        runtime.namespace("test").component("backend").endpoint("generate")
     )
 
     # Create client and wait for service to be ready

examples/custom_backend/hello_world/hello_world.py

@@ -23,7 +23,7 @@ async def content_generator(request: str):
 
 @dynamo_worker()
 async def worker(runtime: DistributedRuntime):
-    namespace_name = "hello_world"
+    namespace_name = "test"
     component_name = "backend"
     endpoint_name = "generate"