Inherit examples from Digest Fields

[ioggstream]

I expect

• inherit examples from https://www.rfc-editor.org/rfc/rfc9530.html

[Acconut]

I looked at the examples and only C.3. Server Does Not Support Client Algorithm and Returns an Error contains an error response caused by integrity fields. That one even uses problem details.

Do you think we should inherit other examples as well?

[ioggstream]

Once we merge the other PRs I'll scrub the spec and check :)