Manage Subscription updates

[kimsauce]

Purpose of this pull request

Manage/Manage Subscription text and img updates to prep for new Essentials plan

NOTE! This whole section will get an overhaul after all of the upcoming Dec-Jan plan changes. This is just so it makes sense w/interim changes.

Select the type of change

• Minor Changes - Typos, formatting, slight revisions
• Update Content - Revisions, updating sections
• New Content - New features, sections, pages, tutorials
• Site and Tools - .clabot, version updates, maintenance, dependencies, new packages for the site (Docusaurus, Gatsby, React, etc.)

Ticket (if applicable)

https://sumologic.atlassian.net/browse/DOCS-559