USWDS-Site - Enhancement: Consider adding uswds prefix to path settings table

[amyleadem]

Summary

Our paths settings table on the Phase: 2 compile page currently lists path settings as paths.dist.img, etc, but then references uswds.paths.dist.img in the code samples. This can be confusing for users who might not understand the difference. We should either update the table to include the uswds prefix, or give some instruction for adding a prefix based on the const declaration at the top of the gulpfile.js.

[amyleadem]

Adding a triage label because this never went through the triage process.