build(deps): bump third_party/fpga-interchange-schema (#406)

Bumps [third_party/fpga-interchange-schema](https://github.com/SymbiFlow/fpga-interchange-schema) from `78abf3f` to `9a48ae4`.
- [Release notes](https://github.com/SymbiFlow/fpga-interchange-schema/releases)
- [Commits](chipsalliance/fpga-interchange-schema@78abf3f...9a48ae4)

---
updated-dependencies:
- dependency-name: third_party/fpga-interchange-schema
  dependency-type: direct:production
...

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Author: dependabot[bot]