update policy examples (#48)

Signed-off-by: Kevin Wang <kevinwzf0126@gmail.com>

artifacts/example/policy_with_labelSelector.yaml

@@ -1,31 +1,32 @@
-apiVersion: propagationstrategy.karmada.io/v1alpha1
-kind: PropagationPolicy
-metadata:
-  name: example-policy
-  namespace: default
-spec:
-  resourceSelector:
-    - apiVersion: apps/v1
-      kind: Deployment
-      names:
-        - nginx
-      namespaces:
-        - default
-        - exclude
-      excludeNamespaces:
-        - exclude
-      labelSelector:
-        matchLabels:
-          a: b
-  association: false
-  placement:
-    clusterAffinity:
-      clusterNames:
-        - cluster1
-        - cluster3
-      exclude:
-        - cluster1
-    spreadConstraints:
-      - maximumClusters: 3
-        minimumClusters: 3
+apiVersion: propagationstrategy.karmada.io/v1alpha1
+kind: PropagationPolicy
+metadata:
+  name: example-policy
+  namespace: default
+spec:
+  resourceSelector:
+    - apiVersion: apps/v1
+      kind: Deployment
+      names:
+        - nginx
+      namespaces:
+        - default
+        - exclude
+      excludeNamespaces:
+        - exclude
+      labelSelector:
+        matchLabels:
+          a: b
+  association: false
+  placement:
+    clusterAffinity:
+      clusterNames:
+        - cluster1
+        - cluster3
+      exclude:
+        - cluster1
+    spreadConstraints:
+      - spreadByLabel: failuredomain.kubernetes.io/zone
+        maximum: 3
+        minimum: 3
   schedulerName: default

artifacts/example/simple_policy.yaml

@@ -22,6 +22,7 @@ spec:
       exclude:
         - cluster2
     spreadConstraints:
-      - maximum: 3
+      - spreadByLabel: failuredomain.kubernetes.io/zone
+        maximum: 3
         minimum: 3
   schedulerName: default