Closes https://github.com/fleetdm/confidential/issues/1818
Changes:
- Updated the layout and content of the `/pricing` page
- `pricing-features-table.yml`: Added an "Ultimate" tier with three
features.
- `build-static-content.js` - Updated the build script to add support
for the "Ultimate" tier in `pricing-features-table.yml`
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Co-authored-by: Mike Thomas <mthomas@fleetdm.com>
