Linting was only running on a subset of our Markdown files in `content`.
This change fixes the glob path, and adds appropriate exclude paths.
Because the glob pattern was incorrect before, we had lots of files that
didn't comply with the linting rules. This commit also fixes those
issues.
Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>
Craig Osterhout
David Karlsson