Fix QoS examples use default namespace

cn/docs/tasks/configure-pod-container/qos-pod-2.yaml

@@ -2,6 +2,7 @@ apiVersion: v1
 kind: Pod
 metadata:
   name: qos-demo-2
+  namespace: qos-example
 spec:
   containers:
   - name: qos-demo-2-ctr

cn/docs/tasks/configure-pod-container/qos-pod-3.yaml

@@ -2,6 +2,7 @@ apiVersion: v1
 kind: Pod
 metadata:
   name: qos-demo-3
+  namespace: qos-example
 spec:
   containers:
   - name: qos-demo-3-ctr

cn/docs/tasks/configure-pod-container/qos-pod-4.yaml

@@ -2,6 +2,7 @@ apiVersion: v1
 kind: Pod
 metadata:
   name: qos-demo-4
+  namespace: qos-example
 spec:
   containers:
 

cn/docs/tasks/configure-pod-container/qos-pod.yaml

@@ -2,6 +2,7 @@ apiVersion: v1
 kind: Pod
 metadata:
   name: qos-demo
+  namespace: qos-example
 spec:
   containers:
   - name: qos-demo-ctr

docs/tasks/configure-pod-container/qos-pod-2.yaml

@@ -2,6 +2,7 @@ apiVersion: v1
 kind: Pod
 metadata:
   name: qos-demo-2
+  namespace: qos-example
 spec:
   containers:
   - name: qos-demo-2-ctr

docs/tasks/configure-pod-container/qos-pod-3.yaml

@@ -2,6 +2,7 @@ apiVersion: v1
 kind: Pod
 metadata:
   name: qos-demo-3
+  namespace: qos-example
 spec:
   containers:
   - name: qos-demo-3-ctr

docs/tasks/configure-pod-container/qos-pod-4.yaml

@@ -2,6 +2,7 @@ apiVersion: v1
 kind: Pod
 metadata:
   name: qos-demo-4
+  namespace: qos-example
 spec:
   containers:
 

docs/tasks/configure-pod-container/qos-pod.yaml

@@ -2,6 +2,7 @@ apiVersion: v1
 kind: Pod
 metadata:
   name: qos-demo
+  namespace: qos-example
 spec:
   containers:
   - name: qos-demo-ctr