fix link

Author: MeeraDi

articles/operator-nexus/howto-run-instance-readiness-testing.md

@@ -144,7 +144,8 @@ You can provide the network information in a `networks-blueprint.yml` file, simi
 
 ### Download IRT
 
-IRT is distributed via tarball from the release section of the [nexus-samples](https://aka.ms/nexus-irt) GitHub repo. You need access to the nexus-samples GitHub repository before you access the nexus-samples.
+IRT is distributed via tarball from the release section of the nexus-samples GitHub repo. 
+
 1. Find the release package marked with 'Latest', download it, extract it, and navigate to the `irt` directory.
 1. Extract the tarball to the local file system: `mkdir -p irt && tar xf nexus-irt.tar.gz --directory ./irt`.
 1. Switch to the new directory `cd irt`.