build(deps): bump third_party/prjxray from 72e6371 to 326dbda

Bumps [third_party/prjxray](https://github.com/f4pga/prjxray) from `72e6371` to `326dbda`.
- [Commits](f4pga/prjxray@72e6371...326dbda)

---
updated-dependencies:
- dependency-name: third_party/prjxray
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>