[slides][params] update link to doxygen parameter list

slides/params.md

@@ -176,7 +176,7 @@ Examples:
 
 ## Parameter list
 
-An overview of all available parameters can be found in the [doxygen documentation](https://dumux.org/docs/doxygen/releases/3.6/a00008.html).
+An overview of all available parameters can be found in the [doxygen documentation](https://dumux.org/docs/doxygen/master/parameterlist_8txt.html).
 
 <img src=img/parameterlist.png>