message: Update reference to cargo's `--offline` feature
diff: @@ -130,10 +130,10 @@ wasm-pack build examples/js-hello-world --mode no-install
  The `build` command can pass extra options straight to `cargo build` even if they are not
  supported in wasm-pack. To use them you should add standalone `--` argument at the very
  end of your command, and all the arguments you want to pass to cargo should go after.
  -For example to build previous example using unstable cargo offline feature:
  +For example, to build the previous example using cargo's offline feature:
  ```
  -wasm-pack build examples/js-hello-world --mode no-install -- -Z offline
  +wasm-pack build examples/js-hello-world --mode no-install -- --offline
  ```
  <hr style="font-size: 1.5em; margin-top: 2.5em"/>
  