Bump tools/bids-specification from db1c9ff to 3bf993b

Bumps [tools/bids-specification](https://github.com/bids-standard/bids-specification) from `db1c9ff` to `3bf993b`.
- [Release notes](https://github.com/bids-standard/bids-specification/releases)
- [Commits](bids-standard/bids-specification@db1c9ff...3bf993b)

---
updated-dependencies:
- dependency-name: tools/bids-specification
  dependency-type: direct:production
...

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