[x/tour] tour: update to new favicon.ico

Change favicon.ico to newer high resolution version from main project.

Change-Id: Iba9a5b13cb9615eaf10167a531065b9f8e101a71
Reviewed-on: https://go-review.googlesource.com/c/148037
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
X-Tour-Commit: 16d3ff4aeb4f07df3cbc2d072b04443a462b2f69
diff --git a/tour/static/img/favicon.ico b/tour/static/img/favicon.ico
index d287722..8d22584 100644
--- a/tour/static/img/favicon.ico
+++ b/tour/static/img/favicon.ico
Binary files differ