Update schema pack to 2021.4

Update the script to point to 2021.4.

Tested: built for evb-ast2500, ran Redfish Service Validator:
                             BASE    2021.4
metadataNamespaces:          2330      2388
pass:                        3239      3249
passAction:                     8         8
passGet:                      120       121
passRedfishUri:               114       115
skipNoSchema:                   3         3
skipOptional:                2180      2184
unverifiedAdditional.complex:   2         0
warnDeprecated:               315       315
warningPresent:                12        11
Validation has:         succeeded succeeded

Saw new schemas:
curl -k https://$bmc/redfish/v1/JsonSchemas/Manager/Manager.json
...
    "title": "#Manager.v1_14_0.Manager"
}

Signed-off-by: Sui Chen <suichen@google.com>
Change-Id: I6560ec010362df28e264d80452059b534b3f89ba
diff --git a/static/redfish/v1/JsonSchemas/Chassis/Chassis.json b/static/redfish/v1/JsonSchemas/Chassis/Chassis.json
index 15490ae..6cb69dc 100644
--- a/static/redfish/v1/JsonSchemas/Chassis/Chassis.json
+++ b/static/redfish/v1/JsonSchemas/Chassis/Chassis.json
@@ -1,5 +1,5 @@
 {
-    "$id": "http://redfish.dmtf.org/schemas/v1/Chassis.v1_18_0.json",
+    "$id": "http://redfish.dmtf.org/schemas/v1/Chassis.v1_19_0.json",
     "$ref": "#/definitions/Chassis",
     "$schema": "http://redfish.dmtf.org/schemas/v1/redfish-schema-v1.json",
     "copyright": "Copyright 2014-2021 DMTF. For the full DMTF copyright policy, see http://www.dmtf.org/about/policies/copyright",
@@ -262,13 +262,15 @@
                     "versionAdded": "v1_12_0"
                 },
                 "Measurements": {
+                    "deprecated": "This property has been deprecated in favor of the ComponentIntegrity resource.",
                     "description": "An array of DSP0274-defined measurement blocks.",
                     "items": {
                         "$ref": "http://redfish.dmtf.org/schemas/v1/SoftwareInventory.json#/definitions/MeasurementBlock"
                     },
                     "longDescription": "This property shall contain an array of DSP0274-defined measurement blocks.",
                     "type": "array",
-                    "versionAdded": "v1_15_0"
+                    "versionAdded": "v1_15_0",
+                    "versionDeprecated": "v1_19_0"
                 },
                 "MediaControllers": {
                     "$ref": "http://redfish.dmtf.org/schemas/v1/MediaControllerCollection.json#/definitions/MediaControllerCollection",
@@ -963,6 +965,6 @@
         }
     },
     "owningEntity": "DMTF",
-    "release": "2021.3",
-    "title": "#Chassis.v1_18_0.Chassis"
+    "release": "2021.4",
+    "title": "#Chassis.v1_19_0.Chassis"
 }
\ No newline at end of file