Correct default value

Author: alex-y-z

content/en-us/reference/engine/classes/DataStoreService.yaml

@@ -188,7 +188,7 @@ methods:
           given prefix.
       - name: pageSize
         type: int
-        default: 0
+        default: 32
         summary: |
           **(Optional)** Number of items to be returned in each page. By default
           is 32.