new-line-at-end-of-file lint fix

Author: elieserr

config/jobs/kubernetes/sig-node/k8s-release-branches.yaml

@@ -148,4 +148,5 @@ periodics:
     testgrid-dashboards: sig-node-release-blocking
     testgrid-tab-name: node-conformance-release-1.33
     testgrid-alert-email: [email protected]
-    description: Node conformance tests in release branch 1.33
+    description: Node conformance tests in release branch 1.33
+