(distribute creds securely): change file name to links

docs/tasks/inject-data-application/distribute-credentials-secure.md

@@ -37,7 +37,7 @@ username and password:
 
 1. Create the Secret
 
-       kubectl create -f secret.yaml
+       kubectl create -f https://k8s.io/docs/tasks/inject-data-application/secret.yaml
 
     **Note:** If you want to skip the Base64 encoding step, you can create a Secret
     by using the `kubectl create secret` command:
@@ -81,7 +81,7 @@ Here is a configuration file you can use to create a Pod:
 
 1. Create the Pod:
 
-       kubectl create -f secret-pod.yaml
+       kubectl create -f https://k8s.io/docs/tasks/inject-data-application/secret-pod.yaml
 
 1. Verify that your Pod is running:
 
@@ -128,7 +128,7 @@ Here is a configuration file you can use to create a Pod:
 
 1. Create the Pod:
 
-       kubectl create -f secret-envars-pod.yaml
+       kubectl create -f https://k8s.io/docs/tasks/inject-data-application/secret-envars-pod.yaml
 
 1. Verify that your Pod is running: