[milo] Fix builder link in swarming build page
[milo] Fix builder link in swarming build page

Bug: 945011
Change-Id: I705b92ab6e8e51560f0b6473c131b527b20b1dc9
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/1536452
Reviewed-by: Nodir Turakulov <ef4933a197ef7b4b3f55f1bec4942aead3637a2a@chromium.org>
Commit-Queue: Ryan Tseng <2190fe9a39b4920ec7bd59c848ec5cccd163056f@chromium.org>

luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go