[infra] Update Win10 in Skolo

The new driver in https://skia-review.googlesource.com/c/skia/+/256356
is unhappy with Win10 v1903, so updating to v1909.

Change-Id: Icb0f22a7e6af23835edea333f9b506b3896f46e6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/256821
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Ben Wagner aka dogben <benjaminwagner@google.com>
2 files changed