aztec-sync PRs in noir are building off of old commits resulting in conflicts

[TomAFrench]

I merged a sync PR earlier today but a new one has popped up which doesn't reflect that we've already merged the previous one.

See:
noir-lang/noir#4482

Looking at the commit it's built on, it's ignoring all commits into noir master since 27th of Feb.
https://github.com/noir-lang/noir/commits/1e02292918b0c4824d2b5f92b88d621558dbd617/

This results in us getting merge conflicts which we need to fix on every sync.