yosys-unstable: unstable-2023-11-08 -> unstable-2023-11-18

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$ nix build '.#yosys-unstable.passthru.updateScript' && cat ./result
---
#!/nix/store/q1c2flcykgr4wwg5a6h450hxbk4ch589-bash-5.2-p15/bin/bash
set -e -u -o pipefail
/nix/store/y7dgn3xjlh49mlahs34q12x4cj2b0asv-nix-update-1.0.0/bin/nix-update --flake yosys-unstable --version branch
YOSYS_SRC=$(nix build .#yosys-unstable.src --no-link --print-out-paths)
ABCREV=$(awk '/^ABCREV/ {print $NF}' $YOSYS_SRC/Makefile)
/nix/store/y7dgn3xjlh49mlahs34q12x4cj2b0asv-nix-update-1.0.0/bin/nix-update --flake yosys-unstable.abc-verifier --version branch=$ABCREV