Heading in footer section

[SaptakS]

While doing HTML validation PR, I found out that the heading <h2> in footer section had richtext inside it. By HTML standards, a heading tag can only have phrase content as a child.

I think (and as also suggested by @chigby in #885 (comment)) there are two different solutions:

1. We split into fields like footer heading, footer_organization_link, etc?
2. Decide if this at all needs to be a heading. If it's just a big text visually, and we don't want to convey the same to the assistive tech users and it doesn't really matter in the content-flow, then we can just style it as normal div and remove role=heading and aria-levels

Refs #885