add NodePool to Evaluation API docs

Author: allisonlarson

website/content/api-docs/evaluations.mdx

@@ -87,6 +87,7 @@ $ curl \
     "JobModifyIndex": 52,
     "NodeID": "",
     "NodeModifyIndex": 0,
+    "NodePool": "default",
     "Status": "complete",
     "StatusDescription": "",
     "Wait": 0,
@@ -173,6 +174,7 @@ $ curl \
   "ModifyIndex": 28,
   "ModifyTime": 1647394818583344000,
   "Namespace": "default",
+  "NodePool": "default,
   "PreviousEval": "0f98f7ea-59ae-4d90-d9bd-b8ce80b9e100",
   "Priority": 50,
   "RelatedEvals": [