errors: reference Go 1.13 article about errors
This commit amends package errors' documentation to include a reference
to the https://go.dev/blog/go1.13-errors blog article. The motivation
is multi-fold, but chiefly the article includes good information about
error philosophy (e.g., when to wrap), and developers who have come to
Go in the intervening five years are likely not have seen this article
at all given the nature of blog publishing and post fanfare. The
material deserves a promotion in visibility.
Change-Id: Ia6f8307784521dd59de3a3d638dbc0a7fcd445e6
GitHub-Last-Rev:
20980dd5070cde495ebb08386ae7b4cd78ccc612
GitHub-Pull-Request: golang/go#69698
Reviewed-on: https://go-review.googlesource.com/c/go/+/616341
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>