Bump prometheus from 0.11.0 to 0.12.0 (#9454)

Bumps [prometheus](https://github.com/tikv/rust-prometheus) from 0.11.0 to 0.12.0.
- [Release notes](https://github.com/tikv/rust-prometheus/releases)
- [Changelog](https://github.com/tikv/rust-prometheus/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tikv/rust-prometheus/compare/v0.11.0...v0.12.0)

---
updated-dependencies:
- dependency-name: prometheus
  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>

substrate/Cargo.lock

@@ -6750,15 +6750,15 @@ dependencies = [
 
 [[package]]
 name = "prometheus"
-version = "0.11.0"
+version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c8425533e7122f0c3cc7a37e6244b16ad3a2cc32ae7ac6276e2a75da0d9c200d"
+checksum = "5986aa8d62380092d2f50f8b1cdba9cb9b6731ffd4b25b51fd126b6c3e05b99c"
 dependencies = [
  "cfg-if 1.0.0",
  "fnv",
  "lazy_static",
+ "memchr",
  "parking_lot 0.11.1",
- "regex",
  "thiserror",
 ]
 

substrate/client/utils/Cargo.toml

@@ -12,7 +12,7 @@ readme = "README.md"
 [dependencies]
 futures = "0.3.9"
 lazy_static = "1.4.0"
-prometheus = { version = "0.11.0", default-features = false }
+prometheus = { version = "0.12.0", default-features = false }
 futures-timer = "3.0.2"
 
 [features]

substrate/utils/prometheus/Cargo.toml

@@ -14,7 +14,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
 log = "0.4.8"
-prometheus = { version = "0.11.0", default-features = false }
+prometheus = { version = "0.12.0", default-features = false }
 futures-util = { version = "0.3.17", default-features = false, features = ["io"] }
 derive_more = "0.99"
 async-std = { version = "1.10.0", features = ["unstable"] }