Update README.md

Author: josemoracard

.learn/exercises/04-runnig-flask/README.md

@@ -1,23 +1,23 @@
-# `04` Demo your API!!
+# `04` Demo your API!
 
-Go ahead and check your API endpoint by typing this URL on your browser and you should see the `Hello!` message like this:
+Go ahead and check your API endpoint by typing this URL on your browser, and you should see the `Hello!` message like this:
 
 ![Demo your API](../../assets/check-live.gif?raw=true)
 
 Congratulations! Your first endpoint is now LIVE!
 
 ## Your URL will be one of two options:
 
-If running through Gitpod, just add `/todos` to the end of your URL in the browser:
+If running through Codespaces or Gitpod, just add `/todos` to the end of your URL in the browser:
 
 ```txt
-GET https://yourgitpodurl:3245/todos
+https://your-custom-url/todos
 ```
 
 If running locally:
 
 ```txt
-GET https://localhost:3245/todos
+https://localhost:3245/todos
 ```