Update toml requirement from 0.7.4 to 0.8.8

Updates the requirements on [toml](https://github.com/toml-rs/toml) to permit the latest version.
- [Commits](toml-rs/toml@toml-v0.7.4...toml-v0.8.8)

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

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

Cargo.toml

@@ -36,5 +36,5 @@ size = "0.4.1"
 sled = "0.34.7"
 thiserror = "1.0.40"
 tokio = { version="1.27.0", features=["full"] }
-toml = "0.7.4"
+toml = "0.8.8"
 uuid = { version="1.3.1", features = ["v4","fast-rng","macro-diagnostics"] }