update windows build systems to use 5.13
Hopes to fix WIndows CI builds like this one:-
https://invent.kde.org/piyushaggarwal/kdeconnect-kde/-/jobs/15177
Edited by Piyush Aggarwal
Hopes to fix WIndows CI builds like this one:-
https://invent.kde.org/piyushaggarwal/kdeconnect-kde/-/jobs/15177