Fix required property in ErrorInformation

Missing required property. ErrorInformation changed from defining a
OneOf[] to regular properties. We missed adding a required.

Change-Id: Ia23133d9896787d24fc2c3683174119bee0926ee
Signed-off-by: Aushim Nagarkatti <anagarkatti@nvidia.com>
diff --git a/specification/json/sections/cper-arm-processor.json b/specification/json/sections/cper-arm-processor.json
index d4df6dd..bc733c9 100644
--- a/specification/json/sections/cper-arm-processor.json
+++ b/specification/json/sections/cper-arm-processor.json
@@ -106,6 +106,7 @@
                         "additionalProperties": false,
                         "minProperties": 1,
                         "maxProperties": 1,
+                        "required": [],
                         "properties": {
                             "cacheError": {
                                 "type": "object",