build(deps): bump third_party/python-sdf-timing
build(deps): bump third_party/python-sdf-timing

Bumps [third_party/python-sdf-timing](https://github.com/SymbiFlow/python-sdf-timing) from `7217615` to `679152c`.
- [Release notes](https://github.com/SymbiFlow/python-sdf-timing/releases)
- [Commits](https://github.com/SymbiFlow/python-sdf-timing/compare/72176159734da7f06122956b3925c7abb95f21d2...679152c9e6b92627cffba186618ab98ac29b627b)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
SymbiFlow/symbiflow-xc-fasm2bels