DEPS: update luci_go

https://chromium.googlesource.com/infra/infra/+/56ae79476e3caf14da59d75118408aa778637936

Bug: chromium:1070487
Change-Id: I11e824f5983ebb94cdabc1c9e52baddf3e3311cd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2152067
Auto-Submit: Ye Kuang <yekuang@google.com>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67163}

DEPS

@@ -34,7 +34,7 @@ vars = {
   'gn_version': 'git_revision:5ed3c9cc67b090d5e311e4bd2aba072173e82db9',
 
   # luci-go CIPD package version.
-  'luci_go': 'git_revision:de73cf6c4bde86f0a9c8d54151b69b0154a398f1',
+  'luci_go': 'git_revision:56ae79476e3caf14da59d75118408aa778637936',
 
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling android_sdk_build-tools_version