Bump serde from 1.0.204 to 1.0.208

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.204 to 1.0.208.
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](serde-rs/serde@v1.0.204...v1.0.208)

---
updated-dependencies:
- dependency-name: serde
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Cargo.toml

@@ -13,6 +13,6 @@ config = "0.14.0"
 futures = "0.3.29"
 log = "0.4.22"
 pretty_env_logger = "0.5.0"
-serde = { version = "1.0.204", features = ["derive"] }
+serde = { version = "1.0.208", features = ["derive"] }
 serenity = {version = "0.10.10", default-features = false, features = ["client", "gateway", "rustls_backend", "model"]}
 tokio = {version = "1.39.1", features = ["full"]}