chore(deps): update enr requirement from 0.8.1 to 0.9.0 (gakonst#2517)

Updates the requirements on [enr](https://github.com/sigp/enr) to permit the latest version.
- [Release notes](https://github.com/sigp/enr/releases)
- [Commits](sigp/enr@v0.8.1...v0.9.0)

---
updated-dependencies:
- dependency-name: enr
  dependency-type: direct:production
...

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

ethers-providers/Cargo.toml

@@ -50,7 +50,7 @@ futures-channel = { workspace = true, optional = true }
 pin-project.workspace = true
 
 # peer-related admin namespace
-enr = { version = "0.8.1", default-features = false, features = ["k256", "serde"] }
+enr = { version = "0.9.0", default-features = false, features = ["k256", "serde"] }
 
 # tracing
 tracing = { workspace = true, features = ["attributes"] }