Add newline to the end of file

hack/krmFunctionBenchmark/label_namespace/containerfn/containerfn.yaml

@@ -8,4 +8,4 @@ metadata:
         image: gcr.io/kpt-functions/label-namespace@sha256:4f030738d6d25a207641ca517916431517578bd0eb8d98a8bde04e3bb9315dcd
 data:
   label_name: my-ns-name
-  label_value: function-test
+  label_value: function-test

hack/krmFunctionBenchmark/label_namespace/containerfn/data1.yaml

@@ -1,4 +1,4 @@
 apiVersion: v1
 kind: Namespace
 metadata:
-  name: my-namespace
+  name: my-namespace

hack/krmFunctionBenchmark/label_namespace/containerfn/data2.yaml

@@ -1,4 +1,4 @@
 apiVersion: v1
 kind: Namespace
 metadata:
-  name: another-namespace
+  name: another-namespace

hack/krmFunctionBenchmark/label_namespace/containerfn/kustomization.yaml

@@ -2,4 +2,4 @@ resources:
 - data1.yaml
 - data2.yaml
 transformers:
-- containerfn.yaml
+- containerfn.yaml