docs: add StephNathai as a contributor for a11y (#1408)

* 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

@@ -2472,7 +2472,8 @@
       "avatar_url": "https://avatars.githubusercontent.com/u/11414958?v=4",
       "profile": "https://github.com/StephNathai",
       "contributions": [
-        "code"
+        "code",
+        "a11y"
       ]
     },
     {

README.md

@@ -484,7 +484,7 @@ Thanks goes to these wonderful people
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/macmillen"><img src="https://avatars.githubusercontent.com/u/33156526?v=4?s=100" width="100px;" alt="Milan Jaritz"/><br /><sub><b>Milan Jaritz</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=macmillen" title="Documentation">📖</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/dzonatan"><img src="https://avatars.githubusercontent.com/u/5166666?v=4?s=100" width="100px;" alt="Rokas Brazdžionis"/><br /><sub><b>Rokas Brazdžionis</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=dzonatan" title="Documentation">📖</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://thomaslaforge.dev/home"><img src="https://avatars.githubusercontent.com/u/30832608?v=4?s=100" width="100px;" alt="Laforge Thomas"/><br /><sub><b>Laforge Thomas</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=tomalaforge" title="Documentation">📖</a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://github.com/StephNathai"><img src="https://avatars.githubusercontent.com/u/11414958?v=4?s=100" width="100px;" alt="Steph Nathai"/><br /><sub><b>Steph Nathai</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=StephNathai" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/StephNathai"><img src="https://avatars.githubusercontent.com/u/11414958?v=4?s=100" width="100px;" alt="Steph Nathai"/><br /><sub><b>Steph Nathai</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=StephNathai" title="Code">💻</a> <a href="#a11y-StephNathai" title="Accessibility">️️️️♿️</a></td>
     </tr>
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/friederbluemle"><img src="https://avatars.githubusercontent.com/u/743291?v=4?s=100" width="100px;" alt="Frieder Bluemle"/><br /><sub><b>Frieder Bluemle</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=friederbluemle" title="Documentation">📖</a></td>