fixed link to testing-guidelines.md

Breeze.Documentation/API contribution guidelines.md

@@ -4,7 +4,7 @@ Contributing to the Stratis Breeze API
 The Stratis team maintains a few guidelines, which are provided below. Many of these are straightforward.  
 For any questions a Stratis team member will be happy to explain more.
 
-We follow the Stratis Full node's [contributing](https://github.com/stratisproject/StratisBitcoinFullNode/blob/master/Documentation/contributing.md), [coding style](https://github.com/stratisproject/StratisBitcoinFullNode/blob/master/Documentation/coding-style.md) and [testing](https://github.com/stratisproject/StratisBitcoinFullNode/blob/master/Documentation/coding-style.md) guidelines.
+We follow the Stratis Full node's [contributing](https://github.com/stratisproject/StratisBitcoinFullNode/blob/master/Documentation/contributing.md), [coding style](https://github.com/stratisproject/StratisBitcoinFullNode/blob/master/Documentation/coding-style.md) and [testing](https://github.com/stratisproject/StratisBitcoinFullNode/blob/master/Documentation/testing-guidelines.md) guidelines.
 
 By contributing to this repository, you agree to license your work under the 
 [Stratis](https://github.com/stratisproject/StratisBitcoinFullNode/blob/master/LICENSE) license unless specified otherwise at