acknowledgements page formatting

[Gulluth]

The formatting for acknowledgements.md was retained from the space constrained section of the last page of VoV3. This formatting makes the content a little hard to parse on web, and creates a very long single line in git. I have also proposed that this page could be used to list SRD contributors (#29), so updating the formatting would help the flow of the page for if/when this content is added.