deps: bump prometheus-client from 0.24.1 to 0.25.0

Bumps [prometheus-client](https://github.com/prometheus/client_rust) from 0.24.1 to 0.25.0.
- [Release notes](https://github.com/prometheus/client_rust/releases)
- [Changelog](https://github.com/prometheus/client_rust/blob/master/CHANGELOG.md)
- [Commits](prometheus/client_rust@v0.24.1...v0.25.0)

---
updated-dependencies:
- dependency-name: prometheus-client
  dependency-version: 0.25.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -137,7 +137,7 @@ if-watch = "3.2"
 multiaddr = "0.18"
 multihash = "0.19"
 multistream-select = { version = "0.14.0", path = "misc/multistream-select" }
-prometheus-client = "0.24"
+prometheus-client = "0.25"
 prost-codec = { version = "0.4.0", path = "misc/prost-codec" }
 prost = "0.14"
 quickcheck = { package = "quickcheck-ext", path = "misc/quickcheck-ext" }