luci-milo.cfg: Add logo

Dawn is missing a logo.

Change-Id: I836dc973119a33353a2d8051b2c84d2519b9a664
Reviewed-on: https://dawn-review.googlesource.com/1600
Reviewed-by: Andrii Shyshkalov <tandrii@google.com>
Commit-Queue: Ryan Tseng <hinoka@google.com>
diff --git a/infra/config/global/luci-milo.cfg b/infra/config/global/luci-milo.cfg
index 70f2c03..5e02278 100644
--- a/infra/config/global/luci-milo.cfg
+++ b/infra/config/global/luci-milo.cfg
@@ -1,3 +1,4 @@
+logo_url: "https://storage.googleapis.com/chrome-infra-public/logo/dawn-logo.png"
 consoles {
   id: "ci"
   name: "Dawn CI Builders"