slightly slow down the speed to sync with the server, and bump version

package.json

@@ -2,7 +2,7 @@
   "name": "zeppelin-vscode",
   "displayName": "Zeppelin Notebook",
   "description": "Apache Zeppelin Notebook Extension for VS Code",
-  "version": "0.2.4",
+  "version": "0.2.5",
   "publisher": "AllenLi1231",
   "author": {
     "name": "Allen Li"
@@ -112,13 +112,13 @@
         "zeppelin.autosave.throttleTime": {
           "order": 2,
           "type": "number",
-          "default": 1,
+          "default": 3,
           "description": "Set paragraph update delay time (in seconds). Avoid too fast changes of cells causing response pressure on Zeppelin server."
         },
         "zeppelin.autosave.poolingInterval": {
           "order": 3,
           "type": "number",
-          "default": 1,
+          "default": 3,
           "description": "Set minimum save interval (in seconds) to Zeppelin server."
         },
         "zeppelin.execution.concurrency": {
@@ -144,7 +144,7 @@
         "zeppelin.interpreter.trackInterval": {
           "order": 6,
           "type": "number",
-          "default": 1,
+          "default": 5,
           "description": "Set minimum interval (in seconds) to track interpreter status."
         },
         "zeppelin.proxy.host": {