docs: add vishr as a contributor for maintenance (#1959)

* docs: update README.md [skip ci]

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

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -11,7 +11,8 @@
       "avatar_url": "https://avatars.githubusercontent.com/u/314036?v=4",
       "profile": "http://vishr.com",
       "contributions": [
-        "design"
+        "design",
+        "maintenance"
       ]
     }
   ],

README.md

@@ -136,7 +136,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
 <!-- markdownlint-disable -->
 <table>
   <tr>
-    <td align="center"><a href="http://vishr.com"><img src="https://avatars.githubusercontent.com/u/314036?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Vishal Rana</b></sub></a><br /><a href="#design-vishr" title="Design">🎨</a></td>
+    <td align="center"><a href="http://vishr.com"><img src="https://avatars.githubusercontent.com/u/314036?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Vishal Rana</b></sub></a><br /><a href="#design-vishr" title="Design">🎨</a> <a href="#maintenance-vishr" title="Maintenance">🚧</a></td>
   </tr>
 </table>