Move hostname parameter to separate variable

Update inventory to support hubble

playbooks/provision.yaml

@@ -23,7 +23,7 @@
     - name: Set hostname
       become: true
       ansible.builtin.hostname:
-        name: "{{ skylab_networking.hostname | default(inventory_hostname) }}"
+        name: "{{ skylab_hostname | default(inventory_hostname) }}"
         use: systemd
 
     - name: Disable case-sensitive tab-completion