Style adjustments to the README table render

[spencerwooo]

This is more of a style preference suggestion rather than an issue ;)

The current README features a table presenting various badges. It is written in Markdown format, which leaves an empty header at the top. We can fix this by writing the table in HTML directly.

Before:

CI/CD
Docs
Package
Meta

After:

CI/CD
Docs
Package
Meta

I'm happy to make a PR for the changes :). Thoughts?