update readme

README.md

@@ -5,7 +5,7 @@ This is a public repository that contains a collection of our current (and past)
 Introduction:
 - [Free and Open Source Software (.pdf)](https://gitlab.ethz.ch/thealternative/courses/blob/master/FOSS_course/slides.pdf)
 - [Introduction to Linux (.pdf)](https://gitlab.ethz.ch/thealternative/courses/blob/master/intro_course/slides.pdf)
-- [Install Guide](https://thealternative.ch/guides/install.php)
+- [Install Guide](https://gitlab.ethz.ch/thealternative/courses/-/blob/master/install_guide_updated/master/install_guide_updated.pdf)
 - [Bash Guide](https://thealternative.ch/guides/bash.php)
 
 Console & Bash: