Add missing article (#18707)

Added missing article in one of the sentences

content/en/docs/tasks/inject-data-application/downward-api-volume-expose-pod-information.md

@@ -59,7 +59,7 @@ Create the Pod:
 kubectl apply -f https://k8s.io/examples/pods/inject/dapi-volume.yaml
 ```
 
-Verify that Container in the Pod is running:
+Verify that the Container in the Pod is running:
 
 ```shell
 kubectl get pods