build(deps): update dtoa requirement from 0.4 to 1.0

Updates the requirements on [dtoa](https://github.com/dtolnay/dtoa) to permit the latest version.
- [Release notes](https://github.com/dtolnay/dtoa/releases)
- [Commits](dtolnay/dtoa@0.4.0...1.0.1)

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

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

Cargo.toml

@@ -14,7 +14,7 @@ documentation = "https://docs.rs/open-metrics-client"
 members = ["derive-text-encode"]
 
 [dependencies]
-dtoa = "0.4"
+dtoa = "1.0"
 itoa = "1.0"
 owning_ref = "0.4"
 open-metrics-client-derive-text-encode = { version = "0.1.1", path = "derive-text-encode" }