omg validation errors -> link to documentation for explanation

[wilzbach]

From https://github.com/omg-services/sendgrid

omg validate
1 error found:
  1. root should have required property 'info'

It took me quite a while to realize that this section is meant:

https://microservice.guide/schema/info/

Can we add shortlinks to the docs to help the user?

[Arinono]

Yes, this is a good idea.