docs: add tjenkinson as a contributor (#293)

* docs: update README.md [skip ci]

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

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -294,6 +294,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "tjenkinson",
+      "name": "Tom Jenkinson",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/3259993?v=4",
+      "profile": "https://tjenkinson.me",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -113,6 +113,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
   </tr>
   <tr>
     <td align="center"><a href="https://github.com/BenJam"><img src="https://avatars2.githubusercontent.com/u/158833?v=4" width="64px;" alt=""/><br /><sub><b>Benjamin Nickolls</b></sub></a><br /><a href="https://github.com/github/docs/commits?author=BenJam" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://tjenkinson.me"><img src="https://avatars0.githubusercontent.com/u/3259993?v=4" width="64px;" alt=""/><br /><sub><b>Tom Jenkinson</b></sub></a><br /><a href="https://github.com/github/docs/commits?author=tjenkinson" title="Code">💻</a></td>
   </tr>
 </table>