Audit differences between Bootstrap 4 and Bootstrap 5

[trackleft]

See https://docs.google.com/document/d/1kvby-RpU-tbnina6ILeFh_qkGBqVZJMr5j9kryDZPvs for an example.

Conditions of satisfaction

• [x] Create a spreadsheet similar to this
• [ ] Decide which changes we want to maintain any kind of backwards compatibility support or shim for

Audit sheet: https://docs.google.com/spreadsheets/d/1MpuSbJn7kcV2bWhFi-S6HrBbJ8miOUX_l2o39l-KXIg/edit#gid=0

[akslay]

Check in on color contrast from this issue to see if it's fixed in BS5: https://github.com/az-digital/arizona-bootstrap/issues/321