add isavynskyi as a contributor for doc (#6207)

* update README.md [skip ci]

* update .all-contributorsrc [skip ci]

---------

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

.all-contributorsrc

@@ -1318,6 +1318,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "isavynskyi",
+      "name": "Ihor Savynskyi",
+      "avatar_url": "https://avatars.githubusercontent.com/u/18377497?v=4",
+      "profile": "https://github.com/isavynskyi",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -522,6 +522,7 @@ Thanks goes to these wonderful people:
       <td align="center" valign="top" width="14.28%"><a href="https://stefanomondino.com"><img src="https://avatars.githubusercontent.com/u/1691903?v=4" width="100px;" alt=""/><br /><sub><b>Stefano Mondino</b></sub></a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/leszko11"><img src="https://avatars.githubusercontent.com/u/23533452?v=4" width="100px;" alt=""/><br /><sub><b>Łukasz Lech</b></sub></a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/costapombo"><img src="https://avatars.githubusercontent.com/u/31352351?v=4" width="100px;" alt=""/><br /><sub><b>costapombo</b></sub></a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/isavynskyi"><img src="https://avatars.githubusercontent.com/u/18377497?v=4" width="100px;" alt=""/><br /><sub><b>Ihor Savynskyi</b></sub></a></td>
     </tr>
   </tbody>
 </table>