Update tests/README.md

Co-authored-by: Saylor Berman <[email protected]>

Author: lucacome

tests/README.md

@@ -201,7 +201,7 @@ make delete-kind-cluster
 
 ## System Testing
 
-The tests in this directory are meant to be run on a live Kubernetes environment to verify a real system. These
+The system tests are meant to be run on a live Kubernetes environment to verify a real system. These
 are similar to the existing [conformance tests](../conformance/README.md), but will verify things such as:
 
 - NGF-specific functionality