chore(deps): bump bids-validator/spec from d6e77f1 to d3906e2 (#1769

)

Bumps [bids-validator/spec](https://github.com/bids-standard/bids-specification) from `d6e77f1` to `d3906e2`.
- [Release notes](https://github.com/bids-standard/bids-specification/releases)
- [Commits](bids-standard/bids-specification@d6e77f1...d3906e2)

---
updated-dependencies:
- dependency-name: bids-validator/spec
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>