build(deps): bump third_party/yosys from `dac5bd1` to `b08688f` (#2390)

Bumps [third_party/yosys](https://github.com/YosysHQ/yosys) from `dac5bd1` to `b08688f`.
- [Release notes](https://github.com/YosysHQ/yosys/releases)
- [Commits](https://github.com/YosysHQ/yosys/compare/dac5bd1983a5078e3e7426df1e8ee48d300ead7d...b08688f71197316cd44859b8ced16136cf1b3957)

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

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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 dac5bd1..b08688f 160000
--- a/third_party/yosys
+++ b/third_party/yosys
@@ -1 +1 @@
-Subproject commit dac5bd1983a5078e3e7426df1e8ee48d300ead7d
+Subproject commit b08688f71197316cd44859b8ced16136cf1b3957