Update gas-fees.mdx

[aseoconnor]

adding blocknative support details for Gas API

[vercel]

@aseoconnor is attempting to deploy a commit to the Infura Web Team on Vercel.

A member of the Team first needs to authorize it.

[jlwllmr]

Thanks, @aseoconnor. I've moved the content to a new tooling category since the gas-fees page is meant to provide a neutral overview of the core API methods.

Let me know if you're happy with the new page!