changes: Ddoc in html output

[ntrel]

https://dpldocs.info/opend/changes.html
If a module is imported, it $(B must)

BTW the repo seems to be behind the above link:
https://github.com/opendlang/opend-website/blob/master/html/changes.html

[adamdruppe]

oh lol, this is a html file but i have some ddoc habits.

and yeah i haven't pushed for a while ill do it now