main: fix name of program

Should be lowercase so that --help reports the correct usage details.
Before this it was suggesting running with the uppercase name

BUG=chromium:1127071
TEST=ran it

Change-Id: Ib2a0f3d7eb9e7bc64cf6e96ea65b8d1e8e0050dd
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/tnull/+/2482022
Tested-by: Sean Abraham <seanabraham@chromium.org>
Auto-Submit: Sean Abraham <seanabraham@chromium.org>
Reviewed-by: Jared Loucks <jaredloucks@google.com>
Commit-Queue: Jared Loucks <jaredloucks@google.com>
1 file changed