feat: update stroke dash for dotted line type in s2 to render as circles

[madelineluke]

Description

Updating the dotted stroke dash array to create a circle. [0,4] draws a 0px stroke that renders as a point, with a 4px gap.

Related Issue

Motivation and Context

After applying lineCap: round in s2, the dotted line type was rendering each line mark as an oval pill shape, rather than circles.

How Has This Been Tested?

Unit tests and visual testing in storybook.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.