Fix ataman redirect

non-free.md

@@ -50,7 +50,7 @@
 
 ### Internet of Things (IoT)
 
-- [Atman IoT](https://atman-iot.com) - Self hosted IoT gateway focused on IoT solution rapid prototyping, packaged as stand alone docker container, promising to help you build your IoT solution in a week. ([Demo](https://atman-iot.com/signup-redirect)) `⊘ Proprietary` `Nodejs`
+- [Atman IoT](https://atman-iot.com) - Self hosted IoT gateway focused on IoT solution rapid prototyping, packaged as stand alone docker container, promising to help you build your IoT solution in a week. ([Demo](https://atman-iot.com/signup-redirect/)) `⊘ Proprietary` `Nodejs`
 
 
 ### Communication - SIP