[PathKit] Fix document.write warning in docs.

Switch back to using unpkg.com since it's actually a CDN
not a GCS bucket just pretending (lower latency, better
compression, etc).

Also loads consistently since https://skia-review.googlesource.com/c/buildbot/+/152020
landed.

No-Try: true
Docs-Preview: https://skia.org/?cl=151826
Bug: skia:
Change-Id: I9a2a8d71ebc87e44a85bf7ec40d04a0279a97ff1
Reviewed-on: https://skia-review.googlesource.com/151826
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Joe Gregorio <jcgregorio@google.com>
Auto-Submit: Kevin Lubick <kjlubick@google.com>
1 file changed