docs: add BenJam as a contributor (github#178)

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
Co-authored-by: Octomerger Bot <63058869+Octomerger@users.noreply.github.com>

Author: allcontributors[bot]

.all-contributorsrc

@@ -285,6 +285,15 @@
         "bug",
         "code"
       ]
+    },
+    {
+      "login": "BenJam",
+      "name": "Benjamin Nickolls",
+      "avatar_url": "https://avatars2.githubusercontent.com/u/158833?v=4",
+      "profile": "https://github.com/BenJam",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,
@@ -294,4 +303,4 @@
   "repoHost": "https://github.com",
   "skipCi": true,
   "commitConvention": "none"
-}
+}