ATLAS2200 Correct Area 0 keyPattern attribute type

Signed-off-by: David Radley <david_radley@uk.ibm.com>
diff --git a/addons/models/0000-Area0/0017-ExternalIdentifiers_model.json b/addons/models/0000-Area0/0017-ExternalIdentifiers_model.json
index 3a3bb33..fb0d4bf 100644
--- a/addons/models/0000-Area0/0017-ExternalIdentifiers_model.json
+++ b/addons/models/0000-Area0/0017-ExternalIdentifiers_model.json
@@ -62,7 +62,7 @@
         },
         {
           "name": "keyPattern",
-          "typeName": "string",
+          "typeName": "KeyPattern",
           "cardinality": "SINGLE",
           "isIndexable": true,
           "isOptional": true,