doc: Fix go/ link in style guide
doc: Fix go/ link in style guide

Change-Id: I29352378a0463c998caa79d085fd6f2c049a5d6e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/68095
Reviewed-by: Rob Mohr <d07614a8a0b466db08f68224f87d738b0f9615cf@google.com>
Reviewed-by: Keir Mierle <69344103cc60b36d6e1fbdc31ce6504b2286c646@google.com>
Commit-Queue: Paul Mathieu <8791b1cecbf562cc74a5b7acb099775bda2b56a0@google.com>
Commit-Queue: Keir Mierle <69344103cc60b36d6e1fbdc31ce6504b2286c646@google.com>

google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed