DEPS: update luci go

This is to take
crrev.com/c/2036856
crrev.com/c/2036854

Bug: 984869
Change-Id: Iaa623376bfde92ae0620fd20362dd122764a8746
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2037189
Auto-Submit: Takuto Ikuta <tikuta@chromium.org>
Reviewed-by: Yoshisato Yanagisawa <yyanagisawa@google.com>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#738511}

DEPS

@@ -157,7 +157,7 @@ vars = {
   # luci-go CIPD package version.
   # Make sure the revision is uploaded by infra-packagers builder.
   # https://ci.chromium.org/p/infra-internal/g/infra-packagers/console
-  'luci_go': 'git_revision:8c17d4a7b01d6257e927c629cc623ebc6a6b3711',
+  'luci_go': 'git_revision:973b32eddd852fc2c0b7e129b1f619ce6f597901',
 
   # This can be overridden, e.g. with custom_vars, to build clang from HEAD
   # instead of downloading the prebuilt pinned revision.