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/configurations/yosemite4_chassis.json b/configurations/yosemite4_chassis.json
index fac938a..879f1d4 100644
--- a/configurations/yosemite4_chassis.json
+++ b/configurations/yosemite4_chassis.json
@@ -11,6 +11,6 @@
         "SparePartNumber": "$PRODUCT_INFO_AM1"
     },
     "xyz.openbmc_project.Inventory.Item.Chassis": {
-        "ChassisType": "RackMount"
+        "Type": "RackMount"
     }
 }