Bump tests/specifications from c84488c to d1bdb68 (#1490)

Bumps [tests/specifications](https://github.com/mongodb/specifications) from `c84488c` to `d1bdb68`.
- [Release notes](https://github.com/mongodb/specifications/releases)
- [Commits](mongodb/specifications@c84488c...d1bdb68)

---
updated-dependencies:
- dependency-name: tests/specifications
  dependency-type: direct:production
...

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