[promk] Adjust WindowsSkoloOSVersion alert
[promk] Adjust WindowsSkoloOSVersion alert

This is firing on chromium-swarm-dev because there are zero Windows OS
versions in play.

Change-Id: I5f6400ae7e7398aa39c6645abd1263c78a205b64
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/207861
Reviewed-by: Ben Wagner aka dogben <3ef7217be91069877d94f7907ce5479000772cd3@google.com>
Commit-Queue: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot