Update src/pages/using-spark/components/button.mdx
Update src/pages/using-spark/components/button.mdx

Co-authored-by: Bob Wise <a3b812e75c6e8e13b1b37a6fa5893226eb81f63d@quickenloans.com>
sparkdesignsystem/spark-design-system,sparkdesignsystem/spark-design-system,sparkdesignsystem/spark-design-system,sparkdesignsystem/spark-design-system