USWDS-Site - Date picker and date range picker: update props tables

[amyleadem]

Description

Part 1/2 to close uswds/uswds#4247.

Preview link: Date range picker page

Problem

Our documentation provided incorrect information about where to add data-min-date and data-max-date attributes to the date range picker component. Additionally, we do not have have stories to demonstrate how these properties work on date range picker.

Two-part solution

This PR is part 1 of a two-step solution to close uswds/uswds#4247.

• Part 1: USWDS-Site - Update component instructions to point to the correct attribute elements
• Part 2: USWDS - Create stories for the date range picker component to demonstrate correct placement and behavior of the component's properties.
  • Part 2 can be found in this PR: USWDS - Date range picker: Add props controls and stories uswds#4696

Additional information

Before you hit Submit, make sure you’ve done whichever of these applies to you:

• Follow the 18F Front End Coding Style Guide and Accessibility Guide.
• Run npm test and make sure the tests for the files you have changed have passed.
• Run your code through HTML_CodeSniffer and make sure it’s error free.
• Title your pull request using this format: [Website] - [UI component]: Brief statement describing what this pull request solves.