chore(deps): bump bids-validator/spec from da68bd9 to f476d43 (#1526)

Bumps [bids-validator/spec](https://github.com/bids-standard/bids-specification) from `da68bd9` to `f476d43`.
- [Release notes](https://github.com/bids-standard/bids-specification/releases)
- [Commits](bids-standard/bids-specification@da68bd9...f476d43)

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

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

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

Author: dependabot[bot]