Bump third_party/prjxray-db from `9595b7b` to `8502278`
Bump third_party/prjxray-db from `9595b7b` to `8502278`

Bumps [third_party/prjxray-db](https://github.com/SymbiFlow/prjxray-db) from `9595b7b` to `8502278`.
- [Release notes](https://github.com/SymbiFlow/prjxray-db/releases)
- [Commits](https://github.com/SymbiFlow/prjxray-db/compare/9595b7b234a478570a5902f81fc9dfb3d0bea7ca...85022780e809fa405ff7aefd09d085fbe3dac8b2)

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