Bump testdata/specifications from db69351 to 6689929

Bumps [testdata/specifications](https://github.com/mongodb/specifications) from `db69351` to `6689929`.
- [Release notes](https://github.com/mongodb/specifications/releases)
- [Commits](mongodb/specifications@db69351...6689929)

---
updated-dependencies:
- dependency-name: testdata/specifications
  dependency-version: 668992950d975d3163e538849dd20383a214fc37
  dependency-type: direct:production
...

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

Author: dependabot[bot]