[DESIGN] - The `h2` and `h3` headings are styled too similarly

[bskinn]

What site is this for?

Quansight Consulting, Quansight Labs

Expected behavior

The h2 and h3 heading styling should make it immediately obvious which level a given heading belongs to.

Actual behavior

The styles are too visually similar. We will need to discuss how we want to change the styling.

As an example, this screenshot has:

• h3: Additional Compiler Backends
• h2: Scientific PyTorch
• h3: Sparse Tensors

How to Reproduce the problem?

No response

Anything else?

No response