Fix some typo in init-containers.md

Fixed a typo in manage-resources-containers.md (Kubelet → kubelet)

content/en/docs/concepts/workloads/pods/init-containers.md

@@ -49,9 +49,9 @@ as documented in [Resources](#resources).
 Also, init containers do not support `lifecycle`, `livenessProbe`, `readinessProbe`, or
 `startupProbe` because they must run to completion before the Pod can be ready.
 
-If you specify multiple init containers for a Pod, Kubelet runs each init
+If you specify multiple init containers for a Pod, kubelet runs each init
 container sequentially. Each init container must succeed before the next can run.
-When all of the init containers have run to completion, Kubelet initializes
+When all of the init containers have run to completion, kubelet initializes
 the application containers for the Pod and runs them as usual.
 
 ## Using init containers