USWDS - Documentation: Add incorrect date note to README for site Documentation page

[mahoneycm]

Is your feature request related to a problem? Please describe.

NPM purposefully sets package dates to 10/26/1985 to ensure hash-identical tarballs no matter when or on what device the npm pack is ran. This can confuse users who inspect the package and see the incorrect files for the date.

Proposed Solution

Add a note to the readme, in the "Installing the design system" section to specify this is intended behavior from NPM. This will also update this section in the site Documentation

Affected pages

Documentation page →

Additional context

The site Documentation page is generated using the USWDS readme. Updating here will also add the note there after it is recompiled.

Related issue

• USWDS-Site - Documentation: Add note about incorrect package dates uswds-site#2499