Should the CV32E20 update the target ISA Specifications?

### Bug Description

This issue is motivated by a discussion on pull-request #273.  As of this writing the latest [ratified specifications](https://riscv.org/technical/specifications/) are `20240411`.  Given that this core is multiple months away from a full v1.0.0 release, should we consider targeting the latest versions of the unprivileged and privileged specifications?