docs: align README with simple example

Author: Heiko Seeberger

README.md

@@ -37,6 +37,8 @@ let messages = vec!["Hello", "from pub-sub-client"]
     .map(|text| Message { text })
     .collect::<Vec<_>>();
 let message_ids = pub_sub_client.publish(TOPIC_ID, messages, None).await?;
+let message_ids = message_ids.join(", ");
+println!("Published messages with IDs: {message_ids}");
 ```
 
 Next we call `pull` to get at most the given `42` messages from the given `SUBSCRIPTION_ID`:
@@ -55,13 +57,13 @@ Finally we handle the pulled messages; for simplicity we only deal with the happ
 for pulled_message in pulled_messages {
     let pulled_message = pulled_message?;
     let text = pulled_message.message.text;
-    println!("Pulled `Message` with text `{text}`");
+    println!("Pulled message with text \"{text}\"");
 
     pub_sub_client
         .acknowledge(SUBSCRIPTION_ID, vec![&pulled_message.ack_id], None)
         .await?;
     let id = pulled_message.id;
-    println!("Successfully acknowledged `Message` with ID `{id}`");
+    println!("Successfully acknowledged message with ID {id}");
 }
 ```