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 `679152c` to `11a3f60`.
- [Release notes](https://github.com/SymbiFlow/python-sdf-timing/releases)
- [Commits](https://github.com/SymbiFlow/python-sdf-timing/compare/679152c9e6b92627cffba186618ab98ac29b627b...11a3f606481548996ef65320883e24c59a8659ed)

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