docs: add DmytroLitvinov as a contributor (#384)

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

.all-contributorsrc

@@ -86,6 +86,15 @@
       "contributions": [
         "ideas"
       ]
+    },
+    {
+      "login": "DmytroLitvinov",
+      "name": "Dmytro Litvinov",
+      "avatar_url": "https://avatars.githubusercontent.com/u/16066485?v=4",
+      "profile": "https://DmytroLitvinov.com",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -77,6 +77,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
   </tr>
   <tr>
     <td align="center"><a href="https://github.com/drewbrew"><img src="https://avatars1.githubusercontent.com/u/7773256?v=4?s=80" width="80px;" alt=""/><br /><sub><b>Drew Winstel</b></sub></a><br /><a href="#ideas-drewbrew" title="Ideas, Planning, & Feedback">🤔</a></td>
+    <td align="center"><a href="https://DmytroLitvinov.com"><img src="https://avatars.githubusercontent.com/u/16066485?v=4?s=80" width="80px;" alt=""/><br /><sub><b>Dmytro Litvinov</b></sub></a><br /><a href="https://github.com/browniebroke/django-codemod/commits?author=DmytroLitvinov" title="Documentation">📖</a></td>
   </tr>
 </table>