Fix Query data and Explore data headings that require a design solution

[AlexandracmONRR]

Refer back to issue: Fix Query headings that require a design solution #3526

This should be taken care of when the ODDD team tackles several NRRD issues, including adding Federal Sales to Explore data, etc.

Issues:

• Many of the H1 are different across pages
• Throughout the website, the main subpages have very different title styling when introducing each page
• No instructions for Explore or for Query

Solutions:

• We could improve by creating a consistent style for page Titles and descriptions/instructions
• We can change the tab headings to H3, and could have consistent styling with Download Data H3

Next steps:

• Create prototypes that improve header and instructional text, but create some consistency across the website.