Update how to get your data on data.gov

[jbrown-xentity]

User Story

In order to make things simple for data providers, data.gov managers (and data providers) wants the webpage "How to get your data on data.gov" updated to reflect the H2.0 process and how you can view metrics outside of the emails.

Acceptance Criteria

[ACs should be clearly demoable/verifiable whenever possible. Try specifying them using BDD.]

• GIVEN the harvester and catalog-next are stable enough
  WHEN I go to https://resources.data.gov/resources/data-gov-open-data-howto/
  THEN all resources are relevant and updated to the latest process

Background

Noted by @chris-macdermaid , but would be good to have in place as/before we cutover.

Security Considerations (required)

None

Sketch

Read through document correcting anything out of date.
Add content for new harvester UI, and any other tools/references at their disposal.

[FuhuXia]

Draft PR is ready to be merged upon catalog-beta cutover.