docs: add savcni01 as a contributor for doc (#921)

Author: allcontributors[bot]

.all-contributorsrc

@@ -1582,6 +1582,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "savcni01",
+      "name": "Nik Savchenko",
+      "avatar_url": "https://avatars.githubusercontent.com/u/18025894?v=4",
+      "profile": "https://github.com/savcni01",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -361,6 +361,7 @@ Thanks goes to these wonderful people
     <td align="center"><a href="http://sidharth.dev"><img src="https://avatars.githubusercontent.com/u/10703445?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Sidharth Vinod</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=sidharthv96" title="Documentation">📖</a></td>
     <td align="center"><a href="https://github.com/jankalfus"><img src="https://avatars.githubusercontent.com/u/12714276?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Honza Kalfus</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=jankalfus" title="Documentation">📖</a></td>
     <td align="center"><a href="https://github.com/claidler"><img src="https://avatars.githubusercontent.com/u/43636691?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Christopher Laidler</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=claidler" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://github.com/savcni01"><img src="https://avatars.githubusercontent.com/u/18025894?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Nik Savchenko</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=savcni01" title="Documentation">📖</a></td>
   </tr>
 </table>