fix(label): remove subpixel font-size to prevent visual glitches

[liamdebeasi]

Pull request checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)
• Build (npm run build) was run locally and any changes were pushed
• Lint (npm run lint) has passed locally and any fixes were made for failures

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Issue Number: #20407

Subpixel font-sizes + CSS animations seem to cause some odd visual glitches in Safari, so I've opted to remove the subpixel font size here. There should be no noticeable difference in most browsers as the difference in size is only 0.4px.

This bug has no impact on browsers that support Web Animations.

What is the new behavior?

• Changed 13.6px --> 14px

Does this introduce a breaking change?

• Yes
• No

Other information