guide: use _sample configurations..._ rather than _here_ as link text

Generally while discussion is ongoing, we prefer that you only add more commits so we can quickly see what has changed. However once you believe everything is good to go, we want the commits rebased into a minimal form (often, a single commit, unless the PR is large) to keep the history neat.

In this case, since the PR is small, and this is likely to be the only issue with it, it's safe to just rebase right away.