fix: `loginService` -> `loginItemService` (#42404)

fix: loginService -> loginItemService

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

shell/common/platform_util_mac.mm

@@ -128,7 +128,7 @@ SMAppService* GetServiceForType(const std::string& type,
     return [SMAppService agentServiceWithPlistName:service_name];
   } else if (type == "daemonService") {
     return [SMAppService daemonServiceWithPlistName:service_name];
-  } else if (type == "loginService") {
+  } else if (type == "loginItemService") {
     return [SMAppService loginItemServiceWithIdentifier:service_name];
   } else {
     LOG(ERROR) << "Unrecognized login item type";