docs: add mdjastrzebski as a contributor for doc (testing-library#1137)

Author: allcontributors[bot]

.all-contributorsrc

@@ -2105,6 +2105,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "mdjastrzebski",
+      "name": "Maciej Jastrzebski",
+      "avatar_url": "https://avatars.githubusercontent.com/u/6368606?v=4",
+      "profile": "https://github.com/mdjastrzebski",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -433,6 +433,7 @@ Thanks goes to these wonderful people
   </tr>
   <tr>
     <td align="center"><a href="https://github.com/giovanniPepi"><img src="https://avatars.githubusercontent.com/u/5255535?v=4?s=100" width="100px;" alt=""/><br /><sub><b>giovanniPepi</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=giovanniPepi" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://github.com/mdjastrzebski"><img src="https://avatars.githubusercontent.com/u/6368606?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Maciej Jastrzebski</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=mdjastrzebski" title="Documentation">📖</a></td>
   </tr>
 </table>