[Openid-specs-fapi] Issue #664: Replace [I-D.ietf-oauth-dpop] with RFC9449 (openid/fapi)

[M V]

New issue 664: Replace [I-D.ietf-oauth-dpop] with RFC9449
https://bitbucket.org/openid/fapi/issues/664/replace-i-dietf-oauth-dpop-with-rfc9449

Mark Verstege:

Currently the security profile lists \[[I-D.ietf-oauth-dpop](https://openid.net/specs/fapi-2_0-security-profile-ID2.html#I-D.ietf-oauth-dpop)\]. However [RFC9449](https://datatracker.ietf.org/doc/html/rfc9449) was published September 2023.