Make networkRailCorpus.json an object not an array.

Object/Array support can be handled on the processor side to support either

schemas/data-ingress/network-rail/networkRailCorpus.json

@@ -2,11 +2,11 @@
     "$id": "https://schema.owlboard.info/data-ingress/network-rail/networkRailCorpus.schema.json",
     "$schema": "https://json-schema.org/draft-07/schema#",
     "title": "networkRailCorpus",
-    "type": "array",
-    "additionalItems": false,
-    "items": {
     "type": "object",
-        "required": ["t", "n"],
+    "required": [
+        "t",
+        "n"
+    ],
     "additionalProperties": false,
     "properties": {
         "t": {
@@ -27,5 +27,4 @@
             "maximum": 999999
         }
     }
-    }
 }