Update CONTRIBUTING.md (#31)

Author: marianoao

CONTRIBUTING.md

@@ -13,8 +13,7 @@ this project.
 
 ## Prerequisites
 
-- Before starting to contribute to the code, you must first sign the
-  [Contributor License Agreement (CLA)](https://github.com/InditexTech/foss/blob/main/documents/CLA.pdf).
+- Before starting to contribute to the code, you must first sign the Contributor License Agreement (CLA).
   Detailed instructions on how to proceed can be found [here](https://github.com/InditexTech/foss/blob/main/CONTRIBUTING.md).
 
 ## How to Contribute