Update README.md

Fix Effects link

README.md

@@ -52,7 +52,7 @@ Find here more details on [supported platforms and configuration sets](doc/devel
 Covers these topics:
 - [Getting Started and Installation](https://docs.hyperion-project.org/user/GettingStarted.html)
 - [Configuration](https://docs.hyperion-project.org/user/Configuration.html)
-- [Effect development](https://docs.hyperion-project.org/effects/#effect-files)
+- [Effect development](https://docs.hyperion-project.org/effects/Effects.html)
 - [JSON API](https://docs.hyperion-project.org/json/JSON.html)
 
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