Fix link in nanostat usage to point at correct branch
Fix link in nanostat usage to point at correct branch

Change-Id: I41f4fb783d729c1dc67bb6119c2f65ac4e64d39b
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/465386
Auto-Submit: Brian Osman <794c0b5534edf5601d88e1d41975d0262da12894@google.com>
Commit-Queue: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>
Reviewed-by: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot