Fix Button component reflow

[joshfarrant]

Summary

Fix reflow of Button component with long text content. The Button's height will now increase to fix the content.

Also corrects (what I assume to be) a mistake with the class name for Buttons with size="medium".

What should reviewers focus on?

• Check there are no visual regressions in the Button component, especially with varying text lengths.

Steps to test:

Link to Storybook

Supporting resources (related issues, external links, etc):

• Closes https://github.com/github/primer/issues/3745
• Closes https://github.com/github/primer/issues/3751
• Closes https://github.com/github/primer/issues/3750

Contributor checklist:

• [x] All new and existing CI checks pass
• [x] Tests prove that the feature works and covers both happy and unhappy paths
• [x] Any drop in coverage, breaking changes or regressions have been documented above
• [x] New visual snapshots have been generated / updated for any UI changes
• [x] All developer debugging and non-functional logging has been removed
• [x] Related issues have been referenced in the PR description

Reviewer checklist:

• [ ] Check that pull request and proposed changes adhere to our contribution guidelines and code of conduct
• [ ] Check that tests prove the feature works and covers both happy and unhappy paths
• [ ] Check that there aren't other open Pull Requests for the same update/change

Screenshots:

Before	After
	

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 2d79ba154139514c48ac82274478a743599d8042

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 6 packages

| Name | Type | | ------------------------ | ----- | | @primer/react-brand | Patch | | @primer/brand-primitives | Patch | | @primer/brand-e2e | Patch | | @primer/brand-fonts | Patch | | @primer/brand-config | Patch | | @primer/brand-storybook | Patch |

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions[bot]]

🟢 No design token changes found

[github-actions[bot]]

🟢 No visual differences found

Our visual comparison tests did not find any differences in the UI.