Pull Request

Description

Favicon is out of date wrt the marketing and documentation sites. Has been this way for a long time. Let's fix this!

[x] Added the Jira Tickets to the title of the PR e.g. (PTV-XXX fixes a terrible bug)
[ ] Added the Github Issue to the title of the PR e.g. (PTV-XXX adds an awesome feature)

Provide details for testing status and how to test the PR:

[ ] Tests pass locally
[ ] Tests pass in github actions
[ ] Manually verified that changes area available (by spinning up an instance and navigating to X to see Y)

[ ] I have performed a self-review of my own code
[ ] I have commented my code, particularly in hard-to-understand areas
[ ] I have made corresponding changes to the documentation
[ ] My changes generate no new browser console messages
[ ] I have added tests that prove my fix is effective or that my feature works
[ ] New and existing unit tests pass locally with my changes
[ ] I have run run the code quality script (make quality) against the codebase

[ ] Ensure there is an "upcoming release notes" file located in release-notes/RELEASE_NOTES_NEXT.md
[ ] Add relevant notes to this document

This section only relevant if this PR is preparing a release

[ ] Integration tests have been run and fully pass
[ ] Bump version in config/release.yml
[ ] Rename release-notes/RELEASE_NOTES_NEXT.md to the appropriate release
[ ] Add release notes document to the release notes index release-notes/index.md