USWDS-Site - Feature: Add date created to changelog for Identifier component

[mejiaj]

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

Identifier component is a core component, we should add the date created to changelog. This will help inform teams & drive adoption.

Describe the solution you'd like

Identifier changelog has date it was introduced.

Describe alternatives you've considered

n/a

Additional context

It's unclear if first entry refers to the creation of the component.

https://designsystem.digital.gov/components/identifier/#latest-updates

Code of Conduct

• [X] I agree to follow this project's Code of Conduct.
• [X] I checked the current issues for duplicate feature requests.

[brunerae]

PR to add Identifier Component.