Bump third_party/yaml-cpp from `a98b8af` to `d9c35b6`
Bump third_party/yaml-cpp from `a98b8af` to `d9c35b6`

Bumps [third_party/yaml-cpp](https://github.com/jbeder/yaml-cpp) from `a98b8af` to `d9c35b6`.
- [Release notes](https://github.com/jbeder/yaml-cpp/releases)
- [Commits](https://github.com/jbeder/yaml-cpp/compare/a98b8af448b2140dd4aebca2c16fe6c25a82be23...d9c35b6079ceff35f395f7017775cd6c5d380112)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
SymbiFlow/prjxray,SymbiFlow/prjxray,SymbiFlow/prjxray,SymbiFlow/prjxray,SymbiFlow/prjxray