change paint examples to use different font

monospace draws different from default, so
use that as the argument to SkTypeface::MakeFromName
in bookmaker examples

Docs-Preview: https://skia.org/?cl=91422
Bug: skia:7464
Change-Id: Id25a6b7ea146134c14f4ee3005a7e1caa7a38ba4
Reviewed-on: https://skia-review.googlesource.com/91422
Reviewed-by: Cary Clark <caryclark@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
Reviewed-by: Cary Clark <caryclark@skia.org>
Commit-Queue: Cary Clark <caryclark@skia.org>
4 files changed