Added updates page to website (currently not linked to)

@thomasgohard The English and French update pages are now working and draw the updates from: https://docs.google.com/spreadsheets/d/16HBO1OVLZKoCswPxdd_2giRULXz_oTUgqK3pRNCRjho/gid=0

These pages are currently not linked to because I didn't have the link text in both languages (can easily be dealt with in a separate PR).