build(deps): bump driver-core/src/test/resources/specifications (#1783)

Bumps [driver-core/src/test/resources/specifications](https://github.com/mongodb/specifications) from `c13d23b` to `48ce8ac`.
- [Release notes](https://github.com/mongodb/specifications/releases)
- [Commits](mongodb/specifications@c13d23b...48ce8ac)

---
updated-dependencies:
- dependency-name: driver-core/src/test/resources/specifications
  dependency-version: 48ce8ac56d481f611061dfabc8c0505c3fc7ef0d
  dependency-type: direct:production
...

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

Author: dependabot[bot]