Bump third_party/prjxray-db from `79aea5d` to `b2c6e1c`
Bump third_party/prjxray-db from `79aea5d` to `b2c6e1c`

Bumps [third_party/prjxray-db](https://github.com/SymbiFlow/prjxray-db) from `79aea5d` to `b2c6e1c`.
- [Release notes](https://github.com/SymbiFlow/prjxray-db/releases)
- [Commits](https://github.com/SymbiFlow/prjxray-db/compare/79aea5dea11a1e9542b4a72a2ddb6e091680f0d5...b2c6e1c6c1693204fbaa1ff974670d4401f66579)

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