Bump third_party/prjxray from `2c39029` to `45a8af8`
Bump third_party/prjxray from `2c39029` to `45a8af8`

Bumps [third_party/prjxray](https://github.com/SymbiFlow/prjxray) from `2c39029` to `45a8af8`.
- [Release notes](https://github.com/SymbiFlow/prjxray/releases)
- [Commits](https://github.com/SymbiFlow/prjxray/compare/2c39029234e20f0d817fda3254fdcf8bf9d2a211...45a8af8d71c285e7115112c564e5d46b6c81dd97)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
SymbiFlow/symbiflow-arch-defs,SymbiFlow/symbiflow-arch-defs