Docs have incorrect pointers to schema files

[jasonboyer]

What are the schemas that are affected by the issue

Probably all, definitely profile (https://github.com/adobe/xdm/blob/master/docs/reference/context/profile.schema.md) and extensibility base schema (https://github.com/adobe/xdm/blob/master/docs/reference/common/extensible.schema.md)

The links look like this: https://github.com/adobe/xdm/blob/master/docs/reference/context/context/profile.schema.json

and should be changed to look like this: https://github.com/adobe/xdm/blob/master/schemas/context/profile.schema.json

[Soundug]

@jasonboyer I would like to take this up.