Replaced HTTP image with one in English

The HTTP image in the English version HTTP lesson is in Spanish - replacing with an English-language image

src/content/lesson/what-is-http.md

@@ -28,7 +28,7 @@ This communication, as shown in the following gif, is carried out through a proc
 
 ### How does HTTP work?
 
-![HTTP](https://github.com/breatheco-de/content/blob/master/src/assets/images/http-3.png?raw=true)
+![HTTP](https://www3.ntu.edu.sg/home/ehchua/programming/webprogramming/images/HTTP_Steps.png)
 
 The HTTP protocol works through requests and responses from the client (e.g., a web browser) and a server (e.g., the computers that host and display websites). 
 
@@ -91,4 +91,4 @@ HTTP status codes can be found [here](https://developer.mozilla.org/es/docs/Web/
 + `2xx` - All OK
 + `3xx` - Redirection
 + `4xx` - Client did something wrong
-+ `5xx` - Server did something wrong
++ `5xx` - Server did something wrong