Resources-for-slog: link to a new slog hander

Change-Id: Ia482b5a90eb82333b410c7aae2d21674d0bcf655
Reviewed-on: https://go-review.googlesource.com/c/wiki/+/632675
Commit-Queue: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>