message: Improve object get example
diff: @@ -94,11 +94,16 @@ impl ObjectStore {
  /// ```no_run
  /// # #[tokio::main]
  /// # async fn main() -> Result<(), async_nats::Error> {
  + /// use tokio::io::AsyncReadExt;
  /// let client = async_nats::connect("demo.nats.io").await?;
  /// let jetstream = async_nats::jetstream::new(client);
  ///
  /// let bucket = jetstream.get_object_store("store").await?;
  - /// let object = bucket.get("FOO").await?;
  + /// let mut object = bucket.get("FOO").await?;
  + ///
  + /// // Object implements `tokio::io::AsyncRead`.
  + /// let mut bytes = vec![];
  + /// object.read_to_end(&mut bytes).await?;
  /// # Ok(())
  /// # }
  /// ```
  