FAMS3-4213 Postal Strike Banner

[JustinMacaulay]

Description

This PR includes the following proposed change(s):

A new banner to warn users of the impacts of the postal Strike

• {FAMS3-4213}

Type of change

• [ ] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Ran locally to make sure the banner appeared as expected.