http vs https in vocab

[OR13]

I pretty much never use http any more, but changing it to https WILL break signatures....

https://github.com/w3c-ccg/citizenship-vocab/blob/main/contexts/citizenship-v1.jsonld#L6

If there is a time to fix this, it's now, otherwise we will be telling users to review terms defined without ssl forever.

http://schema.org/Organization -> https://schema.org/Organization

schema.org automatically redirects, suggesting http should NOT be used.

[aniltj]

Would appreciate this being fixed.

HTTPS is a requirement for USG web sites - https://www.whitehouse.gov/sites/whitehouse.gov/files/omb/memoranda/2015/m-15-13.pdf