Close <dd> tag properly

The <dd> tag wasn't being closed properly and had a 2nd <dd> tag. This
was causing the browser to close it and place an empty <dd> and </dd>
pair after it. This commit closes the <dd> tag in the correct place,
removing the empty pair generated by the browser.
Merge pull request #85 from alphagov/remove-empty-dd

Close <dd> tag properly