Update Site to Ruby 3

[idmken]

Currently on Ruby 2.7.5. Research how to upgrade to latest Ruby 3 and its impact.

I think there is a dependency with our Ruby version, Jekyll, and Cloud.gov pages.

[idmken]

Ruby 2.7.5 is in security maintenance with EOL coming soon.

https://www.ruby-lang.org/en/downloads/

[claytonjbarnette]

This issue was addressed in: #365 on IDManagement.gov using a combination of the two resources below:

Resources :

• https://github.com/cloud-gov/pages-uswds-jekyll
• https://cloud.gov/2023/05/24/cloud-gov-pages-jekyll-ruby-upgrade/

Additional information can be found in the issue below about the move of Playbooks to IDManagement.gov.

• https://github.com/GSA/ficam-playbooks/issues/953

@SuGhadiali