fix compliance in examples due to missing collection link

Author: matthewhanson

examples/item-naip.json

@@ -127,6 +127,10 @@
     {
       "href": "https://example.com/examples/item.json",
       "rel": "self"
+    },
+    {
+      "href": "https://example.com/examples/item.json",
+      "rel": "collection"
     }
   ]
 }

examples/item-nsl.json

@@ -104,6 +104,10 @@
     {
       "href": "https://example.com/examples/item.json",
       "rel": "self"
+    },
+    {
+      "href": "https://example.com/examples/item.json",
+      "rel": "collection"
     }
   ]
 }