Bump spec_tests/hed-specification from c1aad36 to 7f3868b

Bumps [spec_tests/hed-specification](https://github.com/hed-standard/hed-specification) from `c1aad36` to `7f3868b`.
- [Release notes](https://github.com/hed-standard/hed-specification/releases)
- [Commits](hed-standard/hed-specification@c1aad36...7f3868b)

---
updated-dependencies:
- dependency-name: spec_tests/hed-specification
  dependency-type: direct:production
...

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