Update Appointments default font sizes

[JunTaoLuo]

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, I'm removing, renaming or moving a folder

⚠️ TeamSites ⚠️

Examples of a TeamSite: https://va.gov/health and https://benefits.va.gov/benefits/. This scenario is also referred to as the "injected" header and footer. You can reach out in the #sitewide-public-websites Slack channel for questions.

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

• No
• Yes, and I used the proxy-rewrite steps to test the injected header scenario

Summary

• Update default font sizes in the Appointments (VAOS) App
• Appointments (VAOS) Team
• This is not behind a Flipper

Related issue(s)

• Update VAOS default font size to match normalization va.gov-team#96063

Testing done

• Tested locally, see sample screenshots

Screenshots

WIP

	Before	After
Appointments List
Appointment Details (Video)
Scheduling - Type of Care
Scheduling - Type of Facility

What areas of the site does it impact?

Appointments (VAOS)

Acceptance criteria

Quality Assurance & Testing

• I fixed|updated|added unit tests and integration tests for each feature (if applicable).
• 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 of the developed feature is added
• 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

Though I've completed the development checklist from the linked ticket, there are some remaining font size issues. I'll continue testing and working on this with the other FE devs when they are back from the holidays. I've attached some sample screenshots that cover many but not all of the changes that are in this PR.