fix recently changed link

Author: mlinksva

README.md

@@ -68,7 +68,7 @@ From an IP (copyright) perspective, the agreement is dedicated to the public dom
 
 #### Employer
 
-* A [Model IP/OSS Policy](https://processmechanics.com/2015/07/23/a-model-ip-and-open-source-contribution-policy/), based on the employee IP agreement used by Rackspace
+* A [Model IP/OSS Policy](https://processmechanics.com/a-model-ip-and-open-source-contribution-policy/), based on the employee IP agreement used by Rackspace
 
 #### Employee