Tool generates wrong string to load json on Windows

[lucavg]

When running the translation tool on Windows 11, line 44 of lib/util/locale/localization.dart should contain
final jsonContent = await (bundle ?? rootBundle).loadString('assets/locale/${locale.toLanguageTag()}.json;', cache: useCaching);
but instead contains
final jsonContent = await (bundle ?? rootBundle).loadString('assets\locale/${locale.toLanguageTag()}.json', cache: useCaching);

The forward slash near assets/locale gets replaced with a backslash. This was tested on Windows 11, Ubuntu 22.04 and EndeavourOS, only Windows 11 generated a backslash.