test: fix windows startup fallback mock typing

src/daemon/schtasks.startup-fallback.test.ts

@@ -30,7 +30,7 @@ vi.mock("../process/kill-tree.js", () => ({
 }));
 
 vi.mock("node:child_process", () => ({
-  spawn: (...args: unknown[]) => spawn(...args),
+  spawn,
 }));
 
 const {