feat: add openalternative

Author: Siumauricio

.github/sponsors/openalternative.png

@@ -93,6 +93,7 @@ For detailed documentation, visit [docs.dokploy.com](https://docs.dokploy.com).
 <a href="https://cloudblast.io/?ref=dokploy "><img src="https://cloudblast.io/img/logo-icon.193cf13e.svg" width="250px" alt="Cloudblast.io"/></a>
 <a href="https://startupfa.me/?ref=dokploy "><img src=".github/sponsors/startupfame.png" width="65px" alt="Startupfame"/></a>
 <a href="https://itsdb-center.com?ref=dokploy "><img src=".github/sponsors/its.png" width="65px" alt="Itsdb-center"/></a>
+<a href="https://openalternative.co/?ref=dokploy "><img src=".github/sponsors/openalternative.png" width="65px" alt="Openalternative"/></a>
 </div>
 
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