docs: add leschdom as a contributor (#190)

* docs: update README.md

* docs: update .all-contributorsrc

Author: allcontributors[bot]

.all-contributorsrc

@@ -364,6 +364,15 @@
       "contributions": [
         "infra"
       ]
+    },
+    {
+      "login": "leschdom",
+      "name": "Dominik Lesch",
+      "avatar_url": "https://avatars.githubusercontent.com/u/62334278?v=4",
+      "profile": "https://github.com/leschdom",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "repoType": "github",

README.md

@@ -271,6 +271,7 @@ Thanks goes to these people ([emoji key][emojis]):
   <tr>
     <td align="center"><a href="https://github.com/SimenB"><img src="https://avatars1.githubusercontent.com/u/1404810?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Simen Bekkhus</b></sub></a><br /><a href="https://github.com/testing-library/cypress-testing-library/commits?author=SimenB" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/amitmiran137"><img src="https://avatars.githubusercontent.com/u/47772523?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Amit Miran</b></sub></a><br /><a href="#infra-amitmiran137" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
+    <td align="center"><a href="https://github.com/leschdom"><img src="https://avatars.githubusercontent.com/u/62334278?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Dominik Lesch</b></sub></a><br /><a href="https://github.com/testing-library/cypress-testing-library/commits?author=leschdom" title="Documentation">📖</a></td>
   </tr>
 </table>