net/http: doc: update RFC reference for appropriate HTTP codes
This documentation commit points to the latest RFC documenting HTTP codes
Change-Id: Ia7640664637f0c7846e2182353b787474bac7b4f
GitHub-Last-Rev:
5fb544ee32e1f16c871b08d9ff0a3cc6819418cd
GitHub-Pull-Request: golang/go#53318
Reviewed-on: https://go-review.googlesource.com/c/go/+/411475
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>