schemas: modify the property name of chassis types

Modify the property name so that it matches the one
defined in phosphor-dbus-interfaces.

[1] https://github.com/openbmc/phosphor-dbus-interfaces/blob/master/yaml/xyz/openbmc_project/Inventory/Item/Chassis.interface.yaml

Change-Id: I1dcef0b11bd3cb6bc0fab141da5e85722647289a
Signed-off-by: Sean He <sean.he.wiwynn@gmail.com>
diff --git a/schemas/openbmc-dbus.json b/schemas/openbmc-dbus.json
index bc9a988..12c974b 100644
--- a/schemas/openbmc-dbus.json
+++ b/schemas/openbmc-dbus.json
@@ -132,7 +132,7 @@
                         "Chassis": {
                             "additionalProperties": false,
                             "properties": {
-                                "ChassisType": {
+                                "Type": {
                                     "type": "string"
                                 }
                             },