chore: updated contributors list

Author: ntamas

.all-contributorsrc

@@ -639,6 +639,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "SKG24",
+      "name": "Sanat Kumar Gupta",
+      "avatar_url": "https://avatars.githubusercontent.com/u/123228827?v=4",
+      "profile": "https://github.com/SKG24",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7

CONTRIBUTORS.md

@@ -97,6 +97,9 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/GenieTim"><img src="https://avatars.githubusercontent.com/u/8596965?v=4?s=100" width="100px;" alt="Tim Bernhard"/><br /><sub><b>Tim Bernhard</b></sub></a><br /><a href="https://github.com/igraph/python-igraph/commits?author=GenieTim" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/BeaMarton13"><img src="https://avatars.githubusercontent.com/u/204701577?v=4?s=100" width="100px;" alt="Bea Márton"/><br /><sub><b>Bea Márton</b></sub></a><br /><a href="https://github.com/igraph/python-igraph/commits?author=BeaMarton13" title="Code">💻</a></td>
     </tr>
+    <tr>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/SKG24"><img src="https://avatars.githubusercontent.com/u/123228827?v=4?s=100" width="100px;" alt="Sanat Kumar Gupta"/><br /><sub><b>Sanat Kumar Gupta</b></sub></a><br /><a href="https://github.com/igraph/python-igraph/commits?author=SKG24" title="Code">💻</a></td>
+    </tr>
   </tbody>
 </table>