tests: Bump Fedora image version for cross-compilation

tests: Bump Fedora image version for cross-compilation

There are 2 reason for the bump:
 - Fedora 33 is not supported anymore
 - Some changes in the guest agent required updates of
   mingw-headers

Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20220525085953.940116-2-kkostiuk@redhat.com>
Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>