Bump serde_with from 3.18.0 to 3.20.0 in /common

Bumps [serde_with](https://github.com/jonasbb/serde_with) from 3.18.0 to 3.20.0.
- [Release notes](https://github.com/jonasbb/serde_with/releases)
- [Commits](jonasbb/serde_with@v3.18.0...v3.20.0)

---
updated-dependencies:
- dependency-name: serde_with
  dependency-version: 3.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

common/Cargo.lock

@@ -36,7 +36,7 @@ polyline = "0.11.0"
 rand = "0.10.1"
 serde = { version = "1.0.219", features = ["derive"] }
 serde_json = { version = "1.0.150", default-features = false }
-serde_with = "3.18.0"
+serde_with = "3.20.0"
 serde-wasm-bindgen = { version = "0.6.5", optional = true }
 thiserror = "2.0.18"
 uniffi = { workspace = true, optional = true }