Fix Blaze Pro from apply global font family

[lupus2k]

Slack: p1718907547394219-slack-C06DN6QQVAQ

Proposed Changes

Move the font-family inside .blaze-pro, .is-blaze-pro {

Before	After

Why are these changes being made?

The font was applied globally

Testing Instructions

• Using a Classic interface site
• Go to a Calypso (Hosting) page and one in wp-admin
• Check the masterbar font on both pages

Pre-merge Checklist

• Has the general commit checklist been followed? (PCYsg-hS-p2)
• Have you written new tests for your changes?
• Have you tested the feature in Simple (P9HQHe-k8-p2), Atomic (P9HQHe-jW-p2), and self-hosted Jetpack sites (PCYsg-g6b-p2)?
• Have you checked for TypeScript, React or other console errors?
• Have you used memoizing on expensive computations? More info in Memoizing with create-selector and Using memoizing selectors and Our Approach to Data
• Have we added the "[Status] String Freeze" label as soon as any new strings were ready for translation (p4TIVU-5Jq-p2)?
• For changes affecting Jetpack: Have we added the "[Status] Needs Privacy Updates" label if this pull request changes what data or activity we track or use (p4TIVU-aUh-p2)?

[github-actions]

Link to live branch is being generated...
Please wait a few minutes and refresh this page.

[matticbot]

This PR does not affect the size of JS and CSS bundles shipped to the user's browser.

Generated by performance advisor bot at iscalypsofastyet.com.