Bump the cargo-dependencies group with 3 updates

Bumps the cargo-dependencies group with 3 updates: [reqwest](https://github.com/seanmonstar/reqwest), [serde](https://github.com/serde-rs/serde) and [tokio](https://github.com/tokio-rs/tokio).


Updates `reqwest` from 0.12.5 to 0.12.7
- [Release notes](https://github.com/seanmonstar/reqwest/releases)
- [Changelog](https://github.com/seanmonstar/reqwest/blob/master/CHANGELOG.md)
- [Commits](seanmonstar/reqwest@v0.12.5...v0.12.7)

Updates `serde` from 1.0.204 to 1.0.209
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](serde-rs/serde@v1.0.204...v1.0.209)

Updates `tokio` from 1.39.2 to 1.40.0
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.39.2...tokio-1.40.0)

---
updated-dependencies:
- dependency-name: reqwest
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: cargo-dependencies
- dependency-name: serde
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: cargo-dependencies
- dependency-name: tokio
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: cargo-dependencies
...

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

Cargo.toml

@@ -10,8 +10,8 @@ clap = { version = "~4.4.18", features = ["derive", "env"] }
 metrics = "0.23.0"
 metrics-exporter-prometheus = { version = "0.15.3", default-features = false, features = ["http-listener"] }
 rand = "0.8.5"
-reqwest = { version = "0.12.5", default-features = false, features = ["rustls-tls", "json"] }
-serde = { version = "1.0.204", features = ["derive"] }
-tokio = { version = "1.39.2", features = ["macros", "rt-multi-thread", "signal"] }
+reqwest = { version = "0.12.7", default-features = false, features = ["rustls-tls", "json"] }
+serde = { version = "1.0.209", features = ["derive"] }
+tokio = { version = "1.40.0", features = ["macros", "rt-multi-thread", "signal"] }
 tracing = "0.1.40"
 tracing-subscriber = "0.3.18"