docs: update .all-contributorsrc [skip ci]

Author: allcontributors[bot]

.all-contributorsrc

@@ -193,6 +193,16 @@
         "design",
         "review"
       ]
+    },
+    {
+      "login": "aragilar",
+      "name": "James Tocknell",
+      "avatar_url": "https://avatars.githubusercontent.com/u/1281144?v=4",
+      "profile": "http://web.science.mq.edu.au/directory/listing/person.htm?id=tjames",
+      "contributions": [
+        "code",
+        "review"
+      ]
     }
   ],
   "contributorsPerLine": 7,