docs: Add missing article
Add an article to make the notes section read more naturally in the doc
requirements doc.
@@ -18,7 +18,7 @@ Containers](https://github.com/kata-containers) project.
# Notes
Important information that is not part of the main document flow should be
-added as a Note in bold with all content contained within block quote:
+added as a Note in bold with all content contained within a block quote:
> **Note:** This is areally important point!
>
