chore(deps): bump bids-validator/spec from 8106ee8 to da68bd9 (#1525

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Bumps [bids-validator/spec](https://github.com/bids-standard/bids-specification) from `8106ee8` to `da68bd9`.
- [Release notes](https://github.com/bids-standard/bids-specification/releases)
- [Commits](bids-standard/bids-specification@8106ee8...da68bd9)

---
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>