[bazel] Specify a Node.js version explicitly.
[bazel] Specify a Node.js version explicitly.

Today, the rules_nodejs repository chooses a Node.js version for us, which at this time is 16.12.0. Let's make that version explicit.

Bug: skia:10614
Change-Id: Id8d31a77e319e2ee9be315b30bc7d33639263fe2
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/515546
Auto-Submit: Leandro Lovisolo <f558143c2568be8d55575d13f30a1fc5cb8009d5@google.com>
Reviewed-by: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>
Commit-Queue: 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