[poe] Issue: Use HTTPS for examples? marked as Editorial

iherman has just labeled an issue for https://github.com/w3c/poe as "Editorial":

== Use HTTPS for examples? ==
I appreciate that this isn't the most pressing issue...

Is there a reason why the `@context` and other URls are all http? 

In https://w3c.github.io/poe/model/
> EXAMPLE 1

```
{
    "@context": "http://www.w3.org/ns/odrl.jsonld",
    "@type": "Set",
    "uid": "http://example.com/policy:1010",
    "permission": [{
        "target": "http://example.com/asset:9898.movie",
        "action": "use"
    }]
}
````

I would have thought that the context should be http**s**.  I understand that it redirects to the secure version - so why not use that by default?

See https://github.com/w3c/poe/issues/290