build(deps): bump third_party/yosys from `031ad38` to `e6021b2` (#2282)

Bumps [third_party/yosys](https://github.com/YosysHQ/yosys) from `031ad38` to `e6021b2`.
- [Release notes](https://github.com/YosysHQ/yosys/releases)
- [Commits](https://github.com/YosysHQ/yosys/compare/031ad38b5cc2410823089e1990cd68694a4a9bb3...e6021b2b485bcff9953f5fbd83595348a7adc84c)

---
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>

third_party/yosys

diff --git a/third_party/yosys b/third_party/yosys
index 031ad38..e6021b2 160000
--- a/third_party/yosys
+++ b/third_party/yosys
@@ -1 +1 @@
-Subproject commit 031ad38b5cc2410823089e1990cd68694a4a9bb3
+Subproject commit e6021b2b485bcff9953f5fbd83595348a7adc84c