Bump tests/specifications from 1cafc53 to c12c50e (#1804)

Bumps [tests/specifications](https://github.com/mongodb/specifications) from `1cafc53` to `c12c50e`.
- [Release notes](https://github.com/mongodb/specifications/releases)
- [Commits](mongodb/specifications@1cafc53...c12c50e)

---
updated-dependencies:
- dependency-name: tests/specifications
  dependency-version: c12c50ed0ff3df870883e2c1d51254e933f9850e
  dependency-type: direct:production
...

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Author: dependabot[bot]