Update threat intel screenshots

[jpipkin1]

Purpose of this pull request

This pull request updates threat intel screenshots to show more sources:

• https://help.sumologic.com/docs/security/threat-intelligence/about-threat-intelligence/#threat-intelligence-sources
• https://help.sumologic.com/docs/security/threat-intelligence/find-threats/#use-the-lookup-search-operator
• https://help.sumologic.com/docs/security/threat-intelligence/threat-intelligence-indicators/#threat-intelligence-tab

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)

None