docs(html): fix <br> tag

[newbornfrontender]

Rollup Plugin Name: html

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

List any relevant issue numbers:

Description

maintainer edit Fixes a <br> tag in the html plugin README

[shellscape]

@newbornfrontender thanks for your PR.

in the future please make sure you choose the correct PR type (this one is a documentation PR since it updates a README), please make sure you fill out the Description section (where we ask people to be verbose about their PR), and please make sure you tick the other appropriate boxes. I've taken the liberty of updating your PR accordingly, to reflect how it should have been filled out.

We ask everyone to follow the issue template and fill it out in its entirety, even maintainers. This helps save maintainers precious time, and saves you time since it removes the need for follow-up discussion. Please do note that if the next PR doesn't follow the template, we will likely choose not to merge it.