Bump serde from 1.0.124 to 1.0.126 (#9099)

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.124 to 1.0.126.
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](https://github.com/serde-rs/serde/compare/v1.0.124...v1.0.126)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

substrate/bin/node/browser-testing/Cargo.toml

@@ -10,7 +10,7 @@ license = "Apache-2.0"
 futures-timer = "3.0.2"
 libp2p = { version = "0.37.1", default-features = false }
 jsonrpc-core = "15.0.0"
-serde = "1.0.106"
+serde = "1.0.126"
 serde_json = "1.0.48"
 wasm-bindgen = { version = "=0.2.73", features = ["serde-serialize"] }
 wasm-bindgen-futures = "0.4.18"