Update dirty bits flow example. Had an incorrect label for the gl::Context and was missing a few edges for new connections. Bug: None Change-Id: I037551f8f0a6559b9c522ae192b1cd93edf9bcf0 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2223815 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>