[annashipman] LibreOffice doesn't exist at the URL
[annashipman] LibreOffice doesn't exist at the URL

The latest version is 4.4.3 but this doesn't exist at
`http://download.documentfoundation.org/libreoffice/stable/4.4.3/mac/x86/`.

This pins it to the previous version, which does exist. Should be updated later.

alphagov/gds-boxen,alphagov/gds-boxen,alphagov/gds-boxen