doc: fix broken x509sha1 setting link
The link was missing the /pkg/ prefix.
Fixes #62034.
Change-Id: I96c43f06621e30241e140948129e90f0bd5f8d13
GitHub-Last-Rev:
c1e7413f76a25ea18a460fb3af732532429d7ff9
GitHub-Pull-Request: golang/go#62040
Reviewed-on: https://go-review.googlesource.com/c/go/+/519575
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>