Review Mozilla 1741428: Bump the MinGW version

https://bugzilla.mozilla.org/show_bug.cgi?id=1741428

So it seems there is a bug in latest widl where enums aren't forward declared correctly in C++:

• https://bugs.winehq.org/show_bug.cgi?id=53431

We will need to either patch the mingw headres (firefox approach) or we can go fix widl (iirc this should be an easy-ish fix)

cc @tom, @boklm, @pierov