update yosys

[rowanG077]

Blocked on: chipsalliance/synlig#2431

I wanted to try out tinytapeout but quickly got stuck that my generated code was giving spurious logic loop warnings. This was an issue in yosys but was fixed in YosysHQ/yosys#4184

But since tinytapeout requires stuff to work in CI I have no choice but to update yosys across the stack.

If it is acceptable I can pull the PR to synlig as a patch so this could get merged faster.

[donn]

Hi Rowan, thanks for the contribution. I have two comments:

• The PR to Synlig will indeed need to be a patch, kind of like Yosys' patches.
• As of 2.0.0's release, we only merge hotfixes to main, with any less urgent changes merged to dev for the next minor release. An issue with a reproducible showing the failure goes a long way to helping me get this in main. (You can create a reproducible out of any step by going to the failing/misbehaving step's directory and writing openlane.steps create-reproducible ., then tarballing the reproducible directory.)

[donn]

superseded by #534 - thank you for your effort