fix: update broken link to code of conduct (!7781) · Merge requests · Administrator / sourcegraph

Administrator requested to merge fix-coc-link into master Jan 15, 2020

Created by: creachadair

The code of conduct lives in the about repository since c15a3db4. Point to the Handbook site rather than the source file.

Supersedes #7779.

fix: update broken link to code of conduct