Make ie easier to find the freeze dates for the next release or two

[timhunt]

What is the Moodle feature that needs documenting?

It may just be me, but I always struggle to find the freeze dates for the next Moodle release. I know they are in the Moodle Development Calendar, but that is not easily browsable. At least, the link on https://moodledev.io/general/releases seems to be an iCal download.

Andrew asked "I’ll look at adding that metadata to our versions json and putting it into the releases page or elsewhere. [Please] Can you create a devdocs issue?" so here it is.

Is this documentation specific to a Moodle version?

None

Are you able to provide a patch for this?

None