Update index.md

docs/index.md

@@ -5,7 +5,7 @@ A command line interface for interacting with user environments on Alps at CSCS.
 uenv will be installed system wide for all users on some CSCS Alps systems. If it is not installed, you can install a local copy by cloning the repository and running the installation script:
 
 ```bash
-git clone git@github.com:eth-cscs/uenv.git && ./uenv/install --local
+git clone https://github.com/eth-cscs/uenv.git && ./uenv/install --local
 ```
 
 For uenv to be available on the command line, an activation script has to be sourced, for which we recommend adding a line to your `~/.bashrc`.