docs: add manusinghal19 as a contributor for doc (#2949)

* docs: update README.md [skip ci]

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

---------

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

.all-contributorsrc

@@ -1536,6 +1536,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "manusinghal19",
+      "name": "Manu Singhal",
+      "avatar_url": "https://avatars.githubusercontent.com/u/8455587?v=4",
+      "profile": "https://github.com/manusinghal19",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -540,6 +540,7 @@ see [the contribution guide](CONTRIBUTING.rst).
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/wer153"><img src="https://avatars.githubusercontent.com/u/23370765?v=4?s=100" width="100px;" alt="Kim Minki"/><br /><sub><b>Kim Minki</b></sub></a><br /><a href="https://github.com/litestar-org/litestar/commits?author=wer153" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://velog.io/@azzurri21"><img src="https://avatars.githubusercontent.com/u/86508420?v=4?s=100" width="100px;" alt="Jeongseop Lim"/><br /><sub><b>Jeongseop Lim</b></sub></a><br /><a href="https://github.com/litestar-org/litestar/commits?author=jseop-lim" title="Documentation">📖</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/FergusMok"><img src="https://avatars.githubusercontent.com/u/10182564?v=4?s=100" width="100px;" alt="FergusMok"/><br /><sub><b>FergusMok</b></sub></a><br /><a href="https://github.com/litestar-org/litestar/commits?author=FergusMok" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/manusinghal19"><img src="https://avatars.githubusercontent.com/u/8455587?v=4?s=100" width="100px;" alt="Manu Singhal"/><br /><sub><b>Manu Singhal</b></sub></a><br /><a href="https://github.com/litestar-org/litestar/commits?author=manusinghal19" title="Documentation">📖</a></td>
     </tr>
   </tbody>
 </table>