docs: add @zaicevas as a contributor for doc (#413)

* docs: update README.md [skip ci]

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

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

Author: allcontributors[bot]

.all-contributorsrc

@@ -400,7 +400,8 @@
       "contributions": [
         "bug",
         "code",
-        "test"
+        "test",
+        "doc"
       ]
     },
     {

README.md

@@ -371,7 +371,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
   </tr>
   <tr>
     <td align="center"><a href="https://github.com/ph-fritsche"><img src="https://avatars.githubusercontent.com/u/39068198?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Philipp Fritsche</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=ph-fritsche" title="Code">💻</a></td>
-    <td align="center"><a href="http://zaicevas.me"><img src="https://avatars.githubusercontent.com/u/34719980?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Tomas Zaicevas</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-testing-library/issues?q=author%3Azaicevas" title="Bug reports">🐛</a> <a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=zaicevas" title="Code">💻</a> <a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=zaicevas" title="Tests">⚠️</a></td>
+    <td align="center"><a href="http://zaicevas.me"><img src="https://avatars.githubusercontent.com/u/34719980?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Tomas Zaicevas</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-testing-library/issues?q=author%3Azaicevas" title="Bug reports">🐛</a> <a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=zaicevas" title="Code">💻</a> <a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=zaicevas" title="Tests">⚠️</a> <a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=zaicevas" title="Documentation">📖</a></td>
     <td align="center"><a href="https://github.com/G-Rath"><img src="https://avatars.githubusercontent.com/u/3151613?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Gareth Jones</b></sub></a><br /><a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=G-Rath" title="Code">💻</a> <a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=G-Rath" title="Documentation">📖</a> <a href="https://github.com/testing-library/eslint-plugin-testing-library/commits?author=G-Rath" title="Tests">⚠️</a></td>
   </tr>
 </table>