docs: add Billy as a contributor (#391)

* docs: update README.md [skip ci]

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -530,6 +530,16 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "Billy",
+      "name": "Billy",
+      "avatar_url": "https://avatars2.githubusercontent.com/u/48111?v=4",
+      "profile": "https://github.com/billy",
+      "contributions": [
+        "talk",
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -109,6 +109,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
   <tr>
     <td align="center"><a href="https://numb86.net/"><img src="https://avatars1.githubusercontent.com/u/16703337?v=4" width="100px;" alt=""/><br /><sub><b>numb86</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=numb86" title="Documentation">📖</a></td>
     <td align="center"><a href="https://github.com/NicholasBoll"><img src="https://avatars2.githubusercontent.com/u/338257?v=4" width="100px;" alt=""/><br /><sub><b>Nicholas Boll</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=NicholasBoll" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://github.com/billy"><img src="https://avatars2.githubusercontent.com/u/48111?v=4" width="100px;" alt=""/><br /><sub><b>Billy</b></sub></a><br /><a href="#talk-Billy" title="Talks">📢</a> <a href="https://github.com/testing-library/testing-library-docs/commits?author=Billy" title="Documentation">📖</a></td>
   </tr>
 </table>