[mesh2d demo] Fix CK init URL

Change-Id: Ia7f9ce1bf20d2ded42e74810673766eb7e3b8ad6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/758336
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Auto-Submit: Florin Malita <fmalita@chromium.org>
1 file changed