Increase fraction digits on cost after Duncen upgrade

[chris13524]

With the move to Duncen many L2s now cost less than 1 cent. This PR adds more decimal places so we can get a better idea on cost.

Before:

After:

[vercel[bot]]

@chris13524 is attempting to deploy a commit to the Crypto Fees Info Team on Vercel.

A member of the Team first needs to authorize it.

[chris13524]

@dmihal wondering if I could get a review on this? :)