message: fix(@effect/core): fix FiberContext.unsafeGetRefs
diff: @@ -516,7 +516,7 @@ export class FiberContext<E, A> implements Fiber.Runtime<E, A> {
  unsafeGetRefs(fiberRefLocals: FiberRefLocals): Map<FiberRef<unknown>, unknown> {
  const refs = new Map<FiberRef<unknown>, unknown>();
  for (const [fiberRef, stack] of fiberRefLocals) {
  - refs.set(fiberRef, stack.head);
  + refs.set(fiberRef, stack.head.get(1));
  }
  return refs;
  }
  