[infra] Update go.sum

I ran "go build -i go.skia.org/infra/..." and this was the result. I've
added that as a step of UpdateGoDeps in
https://skia-review.googlesource.com/c/buildbot/+/267596

Change-Id: Id1494fb012209de1419d4b620c8e8983f2a4d4cd
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/267616
Reviewed-by: Ravi Mistry <rmistry@google.com>
Commit-Queue: Eric Boren <borenet@google.com>
1 file changed