fixed order of diagram and text, text was pointing to diagram "below" when diagram was above (ByteByteGoHq#69)

fixed order of diagram and text, text was pointing to diagram "below",
when diagram was above

Author: LombardiDaniel

README.md

@@ -383,12 +383,12 @@ Note that API design is not just URL path design. Most of the time, we need to c
 
 How is data sent over the network? Why do we need so many layers in the OSI model?
 
+The diagram below shows how data is encapsulated and de-encapsulated when transmitting over the network.
+
 <p>
   <img src="images/osi model.jpeg" />
 </p>
 
-The diagram below shows how data is encapsulated and de-encapsulated when transmitting over the network.
-
 Step 1: When Device A sends data to Device B over the network via the HTTP protocol, it is first added an HTTP header at the application layer.
 
 Step 2: Then a TCP or a UDP header is added to the data. It is encapsulated into TCP segments at the transport layer. The header contains the source port, destination port, and sequence number.