update AB test docs

Author: George Haberis

ab-testing/README.md

@@ -1,6 +1,6 @@
 # Beta AB Test framework
 
-This directory contains the code and configuration for the AB testing framework used on theguardian.com. If you're looking to set up a new server or client side AB test using the new framework then please visit the docs [here](https://github.com/guardian/dotcom-rendering/blob/main/dotcom-rendering/docs/development/ab-testing-in-dcr.md#beta-ab-test-framework).
+This directory contains the code and configuration for the AB testing framework used on theguardian.com. If you're looking to set up a new server or client side AB test using the new framework then please visit the docs [here](https://github.com/guardian/dotcom-rendering/blob/main/dotcom-rendering/docs/development/ab-testing-in-dcr.md).
 
 ## How it works
 

dotcom-rendering/docs/development/ab-testing-in-dcr.md

@@ -189,7 +189,7 @@ You can verify that you're in the test by checking `window.guardian.modules.abTe
 
 ---
 
-<span style="background-color: yellow;">The documentation below is for the **legacy** AB test framework. This framework will be deprecated. It is recommended that any AB tests introduced now use the new framework, documented above.</span>
+:warning: The documentation below is for the LEGACY AB test framework. This framework will be deprecated. It is recommended that any AB tests introduced now use the new framework, documented above. :warning:
 
 # AB Testing in DCR