fix(ras-acc): correct My Account custom font sizing clash

[laurelfulford]

All Submissions:

• Have you followed the Newspack Contributing guideline?
• Does your code follow the WordPress' coding standards and VIP Go coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

This PR fixes a possible issue with very common custom CSS.

See 1207817176293825-as-1208873548407902

How to test the changes in this Pull Request:

1. Add this CSS to the Customizer - it's a pretty common style of snippet that we use to increases/decrease content font sizes:

.entry-content p, 
.entry-content li {
    font-size: 1.1rem;
}

2. In an incognito window, go to My Account, and log in to an existing RAS account.
3. Note the appearance of the OPT message:

4. Apply this PR and run npm run build.
5. Confirm that the message is now sized correctly:

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes, as applicable?
• Have you successfully ran tests with your changes locally?

[github-actions]

Hey @laurelfulford, good job getting this PR merged! 🎉

Now, the needs-changelog label has been added to it.

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Thank you! ❤️

[matticbot]

🎉 This PR is included in version 5.9.0-alpha.2 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀

[matticbot]

🎉 This PR is included in version 5.9.0 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀