docs: add jonathan-taylor as a contributor for code, and content (#19)

* docs: update README.md [skip ci]

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

---------

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

.all-contributorsrc

@@ -36,6 +36,16 @@
         "code",
         "content"
       ]
+    },
+    {
+      "login": "jonathan-taylor",
+      "name": "Jonathan Taylor",
+      "avatar_url": "https://avatars.githubusercontent.com/u/341611?v=4",
+      "profile": "http://statweb.stanford.edu/~jtaylo",
+      "contributions": [
+        "code",
+        "content"
+      ]
     }
   ],
   "contributorsPerLine": 7,