fix(modal): UXD-1699 header height & showcase button

[slee1130]

Purpose 🚀

Fix some minor issue

Notes ✏️

1. header height should be 56px
2. show case button change it to large

Updates 📦

If you have changed a component's source code (not stories, specs, or docs), before merging your branch run yarn changeset. This will prompt you to:

• indicate if changes were patch/minor/major for each modified package
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Storybook 📕

http://storybooks.highbond-s3.com/paprika/your-branch-name

Screenshots 📸

optional but highly recommended

References 🔗

https://aclgrc.atlassian.net/browse/UXD-1897

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: bd61b379eebca99fe2571e081a1a2b08633dc83f

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

This PR includes changesets to release 1 package

| Name | Type | | -------------- | ----- | | @paprika/modal | Patch |

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