build(deps): bump serde in /app/fetcher in the fetcher group

Bumps the fetcher group in /app/fetcher with 1 update: [serde](https://github.com/serde-rs/serde).


Updates `serde` from 1.0.215 to 1.0.216
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](serde-rs/serde@v1.0.215...v1.0.216)

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

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

app/fetcher/Cargo.toml

@@ -13,7 +13,7 @@ openssl = { version = "0.10.66", features = [
     "vendored",
 ] } # Needed only for cargo lambda build
 reqwest = { version = "0.12.9", features = ["json"] }
-serde = "1.0.215"
+serde = "1.0.216"
 serde_json = "1.0.133"
 tokio = { version = "1.42.0", features = ["macros"] }
 tracing = "0.1.41"