[skip ci]Update grafana panel (#13377)

Signed-off-by: NWeida Zhu <weida.zhu@zilliz.com>

deployments/monitor/grafana/milvus-dashboard.json

@@ -16,7 +16,7 @@
   "gnetId": null,
   "graphTooltip": 0,
   "id": 27,
-  "iteration": 1639447677744,
+  "iteration": 1639489221240,
   "links": [],
   "panels": [
     {
@@ -2681,7 +2681,7 @@
       "dashLength": 10,
       "dashes": false,
       "datasource": "prometheus",
-      "description": "Process memory of milvus pod.",
+      "description": "Process memory of milvus pod",
       "fieldConfig": {
         "defaults": {},
         "overrides": []
@@ -3911,7 +3911,7 @@
       {
         "allValue": null,
         "current": {
-          "selected": true,
+          "selected": false,
           "text": "default",
           "value": "default"
         },
@@ -3942,8 +3942,7 @@
       {
         "allValue": null,
         "current": {
-          "isNone": true,
-          "selected": true,
+          "selected": false,
           "text": "None",
           "value": ""
         },
@@ -3974,10 +3973,13 @@
       {
         "allValue": null,
         "current": {
-          "isNone": true,
           "selected": false,
-          "text": "None",
-          "value": ""
+          "text": [
+            "None"
+          ],
+          "value": [
+            ""
+          ]
         },
         "datasource": "$datasource",
         "definition": "label_values(go_info{namespace=\"$namespace\", app_kubernetes_io_instance=~\"$instance\",app_kubernetes_io_name=\"$app_name\"} , pod)",
@@ -4006,10 +4008,13 @@
       {
         "allValue": null,
         "current": {
-          "isNone": true,
           "selected": false,
-          "text": "None",
-          "value": ""
+          "text": [
+            "None"
+          ],
+          "value": [
+            ""
+          ]
         },
         "datasource": "${datasource}",
         "definition": "label_values(go_info{namespace=\"$namespace\", app_kubernetes_io_instance=~\"$instance\",app_kubernetes_io_name=\"$app_name\"} , app_kubernetes_io_component)",