docs: update README

Author: mrholek

README.md

@@ -126,7 +126,7 @@ free-bootstrap-admin-template/
 
 ## Documentation
 
-The documentation for the CoreUI Free Bootstrap Admin Template is hosted at our website [CoreUI](https://coreui.io/)
+The documentation for the CoreUI Free Bootstrap Admin Template is hosted at our website [CoreUI](https://coreui.io/docs/templates/installation/)
 
 ## Contributing