add more description

Author: medyagh

.github/workflows/update-kubernetes-versions-list.yml

@@ -43,4 +43,4 @@ jobs:
           body: |
             This PR was auto-generated by `make update-kubernetes-versions-list` using [update-kubernetes-versions-list.yml](https://github.com/kubernetes/minikube/tree/master/.github/workflows/update-kubernetes-versions-list.yml) CI Workflow.
             The purpose of this ValidKubernetesVersions in the code is, to check a kuberentes version is valid without checking Github on first try
-            and if the version is not valid, it will check Github for the latest valid versions.
+            and if the version is not valid, it will check Github for the latest valid versions. this will save some unesccary network calls.