Update introduction page

[ToddWebDev]

Are you removing, renaming or moving a folder in this PR?

• No, I'm not changing any folders (skip to TeamSites and delete the rest of this section)
• Yes

Did you change site-wide styles, platform utilities or other infrastructure?

• No
• Yes

Summary

Update the introduction page on the Pension Benefits form (21P-527EZ)

Issue

• Minor copy updates to intro page va.gov-team#102861

Design Reference

Go to Figma

Associated Pull Request(s)

n/a

How to run in local environment

1. Check out this branch locally
2. Run vets-website and vets-api
3. In your local environment, set the pension_introduction_update flipper to 'enabled' at http://localhost:3000/flipper/features/pension_introduction_update
4. Go to http://localhost:3001/pension/apply-for-veteran-pension-form-21p-527ez/ in your browser

How to verify

1. Verify the requested copy changes are visible on the introduction page

What areas of the site does it impact?

Pension Benefits Application

Screenshots

Desktop

Before	After

Quality Assurance & Testing

• New unit tests (if applicable)
• New E2E tests added (if applicable)
• Existing unit tests and integration tests are passing
• Existing E2E tests are passing
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs
• Linting warnings have been addressed
• Documentation has been updated (link to documentation *if necessary)
• Screenshot style, layout and content matches the design references
• Accessibility testing has been performed

Error Handling

• Browser console contains no warnings or errors.
• Events are being sent to the appropriate logging solution
• Feature/bug has a monitor built into Datadog or Grafana (if applicable)

Authentication

• Did you login to a local build and verify all authenticated routes work as expected with a test user

Requested Feedback

(OPTIONAL) What should the reviewers know in addition to the above. Is there anything specific you wish the reviewer to assist with. Do you have any concerns with this PR, why?