build(deps): bump third_party/yosys from `171577f` to `0f9ee20` (#2360)

Bumps [third_party/yosys](https://github.com/YosysHQ/yosys) from `171577f` to `0f9ee20`.
- [Release notes](https://github.com/YosysHQ/yosys/releases)
- [Commits](https://github.com/YosysHQ/yosys/compare/171577f909cd0ecc33d879a8925d70f6c9ca8f1e...0f9ee20ea2c9b377f9b28b862f77b197e6485e00)

---
updated-dependencies:
- dependency-name: third_party/yosys
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/third_party/yosys b/third_party/yosys
index 171577f..0f9ee20 160000
--- a/third_party/yosys
+++ b/third_party/yosys
@@ -1 +1 @@
-Subproject commit 171577f909cd0ecc33d879a8925d70f6c9ca8f1e
+Subproject commit 0f9ee20ea2c9b377f9b28b862f77b197e6485e00