Bump spec_tests/hed-specification from 0d8303e to 0e8a9b1

Bumps [spec_tests/hed-specification](https://github.com/hed-standard/hed-specification) from `0d8303e` to `0e8a9b1`.
- [Release notes](https://github.com/hed-standard/hed-specification/releases)
- [Commits](hed-standard/hed-specification@0d8303e...0e8a9b1)

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

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