docs: add brandonzylstra as a contributor for doc (#1525)

Author: allcontributors[bot]

.all-contributorsrc

@@ -2827,6 +2827,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "brandonzylstra",
+      "name": "Brandon Zylstra",
+      "avatar_url": "https://avatars.githubusercontent.com/u/9854?v=4",
+      "profile": "https://github.com/brandonzylstra",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -537,6 +537,7 @@ Thanks goes to these wonderful people
       <td align="center" valign="top" width="14.28%"><a href="https://hdalex.top/"><img src="https://avatars.githubusercontent.com/u/63441399?v=4?s=100" width="100px;" alt="Uaena_Alex_John"/><br /><sub><b>Uaena_Alex_John</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=13RTK" title="Documentation">📖</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/zakingslayerv22"><img src="https://avatars.githubusercontent.com/u/11926638?v=4?s=100" width="100px;" alt="zakingslayerv22"/><br /><sub><b>zakingslayerv22</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=zakingslayerv22" title="Documentation">📖</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/time1043"><img src="https://avatars.githubusercontent.com/u/132178516?v=4?s=100" width="100px;" alt="time1043"/><br /><sub><b>time1043</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=time1043" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/brandonzylstra"><img src="https://avatars.githubusercontent.com/u/9854?v=4?s=100" width="100px;" alt="Brandon Zylstra"/><br /><sub><b>Brandon Zylstra</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=brandonzylstra" title="Documentation">📖</a></td>
     </tr>
   </tbody>
 </table>