docs: update @robinvd as a contributor

.all-contributorsrc

@@ -50,7 +50,8 @@
       "contributions": [
         "code",
         "doc",
-        "infra"
+        "infra",
+        "maintenance"
       ]
     },
     {

CONTRIBUTORS.md

@@ -77,7 +77,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="https://pontus-persson.se/"><img src="https://avatars.githubusercontent.com/u/720546?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Pontus Persson</b></sub></a><br /><a href="https://github.com/Spotifyd/spotifyd/commits?author=PontusPersson" title="Code">💻</a></td>
     <td align="center"><a href="https://qaisjp.com/"><img src="https://avatars.githubusercontent.com/u/923242?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Qais Patankar</b></sub></a><br /><a href="https://github.com/Spotifyd/spotifyd/commits?author=qaisjp" title="Documentation">📖</a></td>
     <td align="center"><a href="https://github.com/Rik-de-Kort"><img src="https://avatars.githubusercontent.com/u/32839123?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Rik-de-Kort</b></sub></a><br /><a href="https://github.com/Spotifyd/spotifyd/commits?author=Rik-de-Kort" title="Documentation">📖</a></td>
-    <td align="center"><a href="https://github.com/robinvd"><img src="https://avatars.githubusercontent.com/u/22073483?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Robin</b></sub></a><br /><a href="https://github.com/Spotifyd/spotifyd/commits?author=robinvd" title="Code">💻</a> <a href="https://github.com/Spotifyd/spotifyd/commits?author=robinvd" title="Documentation">📖</a> <a href="#infra-robinvd" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
+    <td align="center"><a href="https://github.com/robinvd"><img src="https://avatars.githubusercontent.com/u/22073483?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Robin</b></sub></a><br /><a href="https://github.com/Spotifyd/spotifyd/commits?author=robinvd" title="Code">💻</a> <a href="https://github.com/Spotifyd/spotifyd/commits?author=robinvd" title="Documentation">📖</a> <a href="#infra-robinvd" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#maintenance-robinvd" title="Maintenance">🚧</a></td>
     <td align="center"><a href="https://github.com/RlndVt"><img src="https://avatars.githubusercontent.com/u/1658570?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Roland Vet</b></sub></a><br /><a href="https://github.com/Spotifyd/spotifyd/commits?author=RlndVt" title="Documentation">📖</a></td>
   </tr>
   <tr>