fix: rename roles to use underscores instead of hyphens which was causing the roles not to be found

roles/system_setup/tasks/main.yml

@@ -0,0 +1,14 @@
+---
+
+# Upgrade and update packages
+- include_role: 
+    name: system_maintenance
+
+# Install extra packages
+- include_tasks: extra-packages.yaml
+
+# Create a user admin account
+- include_tasks: user.yaml
+
+# Harden SSH configuration
+- include_tasks: ssh.yaml