GitLab

The old string passively implied that the user was somehow at fault. Change the
string to simply state that an update is available and that relaunching will
apply it.

TBR=grt@chromium.org

Bug: none
Change-Id: I42ce3dd12f966b36cb858c0df349f4ae4bbac8be
Reviewed-on: https://chromium-review.googlesource.com/1114196Reviewed-by: Chris Palmer <palmer@chromium.org>
Commit-Queue: Chris Palmer <palmer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570214}