[Docs] Add releaseProcess.md to list of design system docs import

[narin]

Description of Change

We've created new documentation for the Design System's release process in the va-mobile-library repo. This PR adds releaseProcess.md to the list of documentation that gets copied over from the design system repo to the main docusaurus instance.

Corresponding va-mobile-library PR

Screenshots/Video

N/A

Testing

N/A

Reviewer Validations

Check that releaseProcess.md has exists in the va-mobile-library repo

PR Checklist

Reviewer: Confirm the items below as you review

• PR is connected to issue(s)
• Tests are included to cover this change (when possible)
• No magic strings (All string unions follow the Union -> Constant type pattern)
• No secrets or API keys are checked in
• All imports are absolute (no relative imports)
• New functions and Redux work have proper TSDoc annotations

For QA

Run a build for this branch