fix: use host names without dash

hosts

-[master-root]
+[master_root]
 root@shpc0002.ost.ch
 
-[master-software]
+[master_software]
 software@shpc0002.ost.ch
 
-[master-software:vars]
+[master_software:vars]
 ansible_python_interpreter=/cluster/raid/home/software/.guix-profile/bin/python3
\ No newline at end of file

install_software.yaml

 - name: Install software on cluster
-  hosts: master-software
+  hosts: master_software
   vars_files:
     - cluster_config/installation.yaml
     - cluster_config/software.yaml

install_system.yaml

 - name: Install system specific stuff on cluster
-  hosts: master-root
+  hosts: master_root
   tasks:
     - name: Download install script
       ansible.builtin.get_url: