Bump worker from 0.4.1 to 0.4.2 in /example

Bumps [worker](https://github.com/cloudflare/workers-rs) from 0.4.1 to 0.4.2.
- [Release notes](https://github.com/cloudflare/workers-rs/releases)
- [Commits](cloudflare/workers-rs@v0.4.1...v0.4.2)

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

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

example/Cargo.toml

@@ -19,7 +19,7 @@ serde_json = "1.0.128"
 tower-service = "0.3.3"
 url = "2.5.2"
 wasm-bindgen-futures = "0.4.43"
-worker = "^0.4.1"
+worker = "^0.4.2"
 
 # The `console_error_panic_hook` crate provides better debugging of panics by
 # logging them with `console.error`. This is great for development, but requires