changed config file extension name to .cfg

Author: splitnines

playbooks/infra/01_config_backup.yml

@@ -23,5 +23,5 @@
     - name: Save output to file
       copy:
         content: "{{ config_output.stdout[0] }}"
-        dest: "backups/{{ inventory_hostname }}-running-config-{{ timestamp }}.log"
+        dest: "backups/{{ inventory_hostname }}-running-config-{{ timestamp }}.cfg"