build(deps): bump prometheus from 0.13.4 to 0.14.0 (#316)

Bumps [prometheus](https://github.com/tikv/rust-prometheus) from 0.13.4 to 0.14.0.
- [Changelog](https://github.com/tikv/rust-prometheus/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tikv/rust-prometheus/compare/v0.13.4...v0.14.0)

---
updated-dependencies:
- dependency-name: prometheus
  dependency-version: 0.14.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Will Sarg <12886992+willsarg@users.noreply.github.com>

Cargo.toml

@@ -34,7 +34,7 @@ tracing = { version = "0.1", default-features = false }
 tracing-subscriber = { version = "0.3", default-features = false, features = ["fmt", "ansi"] }
 
 # Observability - Prometheus metrics
-prometheus = { version = "0.13", default-features = false }
+prometheus = { version = "0.14", default-features = false }
 
 # Base64 encoding (screenshots, image data)
 base64 = "0.22"