Update memberlist requirement from 0.3 to 0.5

Updates the requirements on [memberlist](https://github.com/al8n/memberlist) to permit the latest version.
- [Release notes](https://github.com/al8n/memberlist/releases)
- [Commits](https://github.com/al8n/memberlist/commits)

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

Signed-off-by: dependabot[bot] <[email protected]>

Cargo.toml

@@ -27,7 +27,7 @@ humantime-serde = "1"
 indexmap = "2"
 memberlist-types = { version = "0.3", default-features = false }
 memberlist-core = { version = "0.3", default-features = false }
-memberlist = { version = "0.3", default-features = false }
+memberlist = { version = "0.5", default-features = false }
 thiserror = "2"
 viewit = "0.1.5"
 smol_str = "0.3"