Update @vitorarins as a contributor

Author: Igor Živković

.all-contributorsrc

@@ -1,6 +1,6 @@
 {
   "projectName": "tinyproxy_exporter",
-  "projectOwner": "Igor Živković",
+  "projectOwner": "igzivkov",
   "repoType": "github",
   "repoHost": "https://github.com",
   "files": [
@@ -16,7 +16,8 @@
       "profile": "https://github.com/vitorarins",
       "contributions": [
         "bug",
-        "code"
+        "code",
+        "doc"
       ]
     }
   ]

README.md

@@ -25,7 +25,7 @@ Thanks goes to these wonderful people ([emoji key](https://github.com/kentcdodds
 
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
 <!-- prettier-ignore -->
-| [<img src="https://avatars3.githubusercontent.com/u/1065028?v=4" width="100px;"/><br /><sub><b>Vitor Arins</b></sub>](https://github.com/vitorarins)<br />[🐛](https://github.com/Igor Živković/tinyproxy_exporter/issues?q=author%3Avitorarins "Bug reports") [💻](https://github.com/Igor Živković/tinyproxy_exporter/commits?author=vitorarins "Code") |
+| [<img src="https://avatars3.githubusercontent.com/u/1065028?v=4" width="100px;"/><br /><sub><b>Vitor Arins</b></sub>](https://github.com/vitorarins)<br />[🐛](https://github.com/igzivkov/tinyproxy_exporter/issues?q=author%3Avitorarins "Bug reports") [💻](https://github.com/igzivkov/tinyproxy_exporter/commits?author=vitorarins "Code") [📖](https://github.com/igzivkov/tinyproxy_exporter/commits?author=vitorarins "Documentation") |
 | :---: |
 <!-- ALL-CONTRIBUTORS-LIST:END -->