[swarming] update luci-go client

This picks up
https://chromium.googlesource.com/infra/infra/+/8c189891315769725ec1122446d5554b312ec725

Bug: 894045
Change-Id: I7b1312f410edbbfb7b8f6f4f4c47dd510ff7e918
Reviewed-on: https://chromium-review.googlesource.com/c/1361360
Commit-Queue: Takuto Ikuta <[email protected]>
Commit-Queue: Marc-Antoine Ruel <[email protected]>
Reviewed-by: Marc-Antoine Ruel <[email protected]>
Cr-Commit-Position: refs/heads/master@{#613570}
1 file changed