upgrade button component in dialog

[keithamus]

Description

Per slack (staff only link)

It looks like the Primer::Alpha::Dialog uses the method with_show_button which generates the deprecated Primer::ButtonComponent and it has different CSS classes than Primer::Beta::Button
Will the Primer::Alpha::Dialog component be updated to show the Primer::Beta::Button button?

Integration

Does this change require any updates to code in production?

We will need to check Dialog show_button slots for incompatible system arguments from the old button

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews

[changeset-bot]

🦋 Changeset detected

Latest commit: 7ccb567

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

This PR includes changesets to release 1 package

Name	Type
@primer/view-components	Patch

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[github-actions]

⚠️ Visual differences found

Our visual comparison tests found UI differences. Please review the differences by viewing the files changed tab to ensure that the changes were intentional.

Review visual differences

[jonrohan]

One thing we'll need to search for here is all the uses of the Dialog component and check that the with_show_button slot isn't passing arguments that are deprecated. https://primer.style/view-components/guides/primer_button_component