build(deps): bump third_party/yaml-cpp from 84459a7 to da82fd9

Bumps [third_party/yaml-cpp](https://github.com/jbeder/yaml-cpp) from `84459a7` to `da82fd9`.
- [Release notes](https://github.com/jbeder/yaml-cpp/releases)
- [Commits](jbeder/yaml-cpp@84459a7...da82fd9)

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

Signed-off-by: dependabot[bot] <[email protected]>