[86bxzrzkk] [d3-chart] update Dots radius

[j-mnizhek]

Motivation and Context

Dots on the charts became a little bit more visible than before. They shouldn't draw too much attention as they provide additional information. So, reducing their size should help reduce visual noise.

How has this been tested?

Tested it locally with our playground.

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 not work as expected).
• [x] Nice improve.

Checklist:

• [x] My code follows the code style of this project.
• [ ] I have updated the documentation accordingly or it's not required.
• [ ] Unit tests are not broken.
• [x] I have added changelog note to corresponding CHANGELOG.md file with planned publish date.
• [ ] I have added new unit tests on added of fixed functionality.