Bump num_cpus from 1.13.1 to 1.14.0 in /ql

Bumps [num_cpus](https://github.com/seanmonstar/num_cpus) from 1.13.1 to 1.14.0.
- [Release notes](https://github.com/seanmonstar/num_cpus/releases)
- [Changelog](https://github.com/seanmonstar/num_cpus/blob/master/CHANGELOG.md)
- [Commits](seanmonstar/num_cpus@v1.13.1...v1.14.0)

---
updated-dependencies:
- dependency-name: num_cpus
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

ql/Cargo.lock

@@ -17,5 +17,5 @@ clap = "2.33"
 tracing = "0.1"
 tracing-subscriber = { version = "0.3.3", features = ["env-filter"] }
 rayon = "1.5.0"
-num_cpus = "1.13.0"
+num_cpus = "1.14.0"
 regex = "1.7.1"