Update font-family for Audience Tile Error titles.

[benbowler]

Summary

Addresses issue:

• Add the Audience Tile Error (Storybook) #8228

Relevant technical choices

PR Author Checklist

• My code is tested and passes existing unit tests.
• My code has an appropriate set of unit tests which all pass.
• My code is backward-compatible with WordPress 5.2 and PHP 7.4.
• My code follows the WordPress coding standards.
• My code has proper inline documentation.
• I have added a QA Brief on the issue linked above.
• I have signed the Contributor License Agreement (see https://cla.developers.google.com/).

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Code Reviewer Checklist

• Run the code.
• Ensure the acceptance criteria are satisfied.
• Reassess the implementation with the IB.
• Ensure no unrelated changes are included.
• Ensure CI checks pass.
• Check Storybook where applicable.
• Ensure there is a QA Brief.

Merge Reviewer Checklist

• Ensure the PR has the correct target branch.
• Double-check that the PR is okay to be merged.
• Ensure the corresponding issue has a ZenHub release assigned.
• Add a changelog message to the issue.

[github-actions]

Build files for 63ecb0c have been deleted.

[github-actions]

Size Change: +2 B (0%)

Total Size: 1.42 MB

Filename	Size	Change
./dist/assets/css/googlesitekit-admin-css-********************.min.css	53.2 kB	+2 B (0%)

ℹ️ View Unchanged

Filename	Size
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./dist/assets/css/googlesitekit-wp-dashboard-css-********************.min.css	7.47 kB
./dist/assets/js/29-********************.js	2.8 kB
./dist/assets/js/30-********************.js	2.28 kB
./dist/assets/js/31-********************.js	3.72 kB
./dist/assets/js/32-********************.js	930 B
./dist/assets/js/33-********************.js	888 B
./dist/assets/js/34-********************.js	3.12 kB
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./dist/assets/js/runtime-********************.js	1.3 kB

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