Update image in reference.md

Amanda Butler · web-flow · commit f7ed763fc80f · 2018-05-02T12:50:03.000-05:00
Upload updated image with changes requested by engineering.
diff --git a/docs/reference/reference.md b/docs/reference/reference.md
@@ -6,4 +6,4 @@ Your application code is written in C++. Your code uses the application programm
 
 This is the basic architecture of an Mbed board:
 
-<span class="images">![](https://s3-us-west-2.amazonaws.com/mbed-os-docs-images/MbedOS@2x.png)<span>A sketch of a typical Mbed board's hardware architecture</span></span>
+<span class="images">![](https://s3-us-west-2.amazonaws.com/mbed-os-docs-images/MbedOS_002.png)<span>A sketch of a typical Mbed board's hardware architecture</span></span>

Original file line number	Diff line number	Diff line change
`@@ -6,4 +6,4 @@ Your application code is written in C++. Your code uses the application programm`
`6`	`6`
`7`	`7`	`This is the basic architecture of an Mbed board:`
`8`	`8`
`9`		`-<span class="images">![](https://s3-us-west-2.amazonaws.com/mbed-os-docs-images/MbedOS@2x.png)<span>A sketch of a typical Mbed board's hardware architecture</span></span>`
	`9`	`+<span class="images">![](https://s3-us-west-2.amazonaws.com/mbed-os-docs-images/MbedOS_002.png)<span>A sketch of a typical Mbed board's hardware architecture</span></span>`