doc: Add @tverdohleb as contributor

Author: fabien0102

.all-contributorsrc

@@ -112,6 +112,13 @@
       "avatar_url": "https://avatars.githubusercontent.com/u/1638544?v=4",
       "profile": "https://github.com/Kusmeroglu",
       "contributions": ["code"]
+    },
+    {
+      "login": "tverdohleb",
+      "name": "Valeriy",
+      "avatar_url": "https://avatars.githubusercontent.com/u/172711?v=4",
+      "profile": "https://tverdohleb.com/",
+      "contributions": ["bug", "code", "ideas"]
     }
   ],
   "contributorsPerLine": 7

README.md

@@ -305,6 +305,9 @@ 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/dan-cooke"><img src="https://avatars.githubusercontent.com/u/22816887?v=4?s=100" width="100px;" alt="Daniel Cooke"/><br /><sub><b>Daniel Cooke</b></sub></a><br /><a href="https://github.com/fabien0102/openapi-codegen/issues?q=author%3Adan-cooke" title="Bug reports">🐛</a> <a href="https://github.com/fabien0102/openapi-codegen/commits?author=dan-cooke" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/Kusmeroglu"><img src="https://avatars.githubusercontent.com/u/1638544?v=4?s=100" width="100px;" alt="Linden Wright"/><br /><sub><b>Linden Wright</b></sub></a><br /><a href="https://github.com/fabien0102/openapi-codegen/commits?author=Kusmeroglu" title="Code">💻</a></td>
     </tr>
+    <tr>
+      <td align="center" valign="top" width="14.28%"><a href="https://tverdohleb.com/"><img src="https://avatars.githubusercontent.com/u/172711?v=4?s=100" width="100px;" alt="Valeriy"/><br /><sub><b>Valeriy</b></sub></a><br /><a href="https://github.com/fabien0102/openapi-codegen/issues?q=author%3Atverdohleb" title="Bug reports">🐛</a> <a href="https://github.com/fabien0102/openapi-codegen/commits?author=tverdohleb" title="Code">💻</a> <a href="#ideas-tverdohleb" title="Ideas, Planning, & Feedback">🤔</a></td>
+    </tr>
   </tbody>
 </table>