Bump tests/specifications from 5b15fd3 to a93fa90

Bumps [tests/specifications](https://github.com/mongodb/specifications) from `5b15fd3` to `a93fa90`.
- [Release notes](https://github.com/mongodb/specifications/releases)
- [Commits](mongodb/specifications@5b15fd3...a93fa90)

---
updated-dependencies:
- dependency-name: tests/specifications
  dependency-version: a93fa90f78038dcb83b0b6dff0adb11e3e0386e1
  dependency-type: direct:production
...

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

Author: dependabot[bot]