upgrade k8s configmap example

Signed-off-by: ryjiang <jiangruiyi@gmail.com>

examples/attu-k8s-deploy-ConfigMap.yaml

@@ -39,7 +39,7 @@ spec:
     spec:
       containers:
       - name: attu
-        image: zilliz/attu:v2.3.1
+        image: zilliz/attu:v2.3.7
         imagePullPolicy: IfNotPresent
         ports:
         - name: attu