build(deps): bump third_party/prjxray from 326dbda to b9ed4b9 (#3454

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Bumps [third_party/prjxray](https://github.com/f4pga/prjxray) from `326dbda` to `b9ed4b9`.
- [Commits](f4pga/prjxray@326dbda...b9ed4b9)

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

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