[x/go.dev] Merge "content/about.md: add best practices section"
[x/go.dev] Merge "content/about.md: add best practices section"

X-GoDev-Commit: 3c678e39be96eb7e022c2d23dafb71c9ab033092

golang/website,golang/website,golang/website,golang/website,golang/website,golang/website,golang/website