Is your feature request related to a problem? Please describe.
The cover image block specifies in the description "Add a full-width image, and layer text over it — great for headers." However, the text outputs in a paragraph tag and not a header.

Describe the solution you'd like
The option for the text to be treated as a heading instead of a paragraph. When the text should be a heading the user should be able to select which heading they would like to use.