hpb: update hpb::Parse -> bool overload to default to the generated registry

PiperOrigin-RevId: 832015599

hpb/hpb.h

diff --git a/hpb/hpb.h b/hpb/hpb.h
index c79f625..3602acf 100644
--- a/hpb/hpb.h
+++ b/hpb/hpb.h
@@ -75,11 +75,10 @@
 ABSL_MUST_USE_RESULT bool Parse(internal::PtrOrRaw<T> message,
                                 absl::string_view bytes,
                                 const ExtensionRegistry& extension_registry =
-                                    ExtensionRegistry::empty_registry()) {
+                                    ExtensionRegistry::generated_registry()) {
   return backend::Parse(message, bytes, extension_registry);
 }
 
-
 // Deprecated. Use the overload that returns hpb::StatusOr<T> instead.
 // Note that the default extension registry is the empty registry.
 template <typename T>