[luci-milo.cfg] Change GN logo

So that it's no longer the Chrome Infra logo.
This is a 3-sided throwing star, in the style of Chromium.

Change-Id: I21d4ac52d38475742ad40cf3eece2de1517bf39d
Reviewed-on: https://gn-review.googlesource.com/2401
Reviewed-by: Petr Hosek <phosek@google.com>

luci-milo.cfg

diff --git a/luci-milo.cfg b/luci-milo.cfg
index 3323812..b935328 100644
--- a/luci-milo.cfg
+++ b/luci-milo.cfg
@@ -1,4 +1,4 @@
-logo_url: "https://storage.googleapis.com/chrome-infra-public/logo/chrome-infra-logo-200x200.png"
+logo_url: "https://storage.googleapis.com/chrome-infra-public/logo/gn-logo.png"
 
 consoles: {
   id: "gn"