CI: use newer gcc for windows builds

13 jobs for !17 with ci-gcc in 29 minutes and 5 seconds (queued for 4 minutes and 17 seconds)
latest detached
Status Job ID Name Coverage
  Build
canceled #400600
amd64 docker
android-arm

canceled #400601
amd64 docker
android-arm64

canceled #400602
amd64 docker
android-x86

canceled #400603
amd64 docker
android-x86_64

canceled #400594
amd64 docker
debian

canceled #400598
macos
ios-arm64

canceled #400599
macos
ios-armv7

canceled #400597
macos
macos

canceled #400596
amd64 docker
raspbian-arm

canceled #400595
amd64 docker
snap

passed #400591
amd64 docker
win32

00:29:05

passed #400592
amd64 docker
win64

00:19:51

passed #400593
amd64 docker
win64-llvm

00:21:27