guestfs: base_image: fix custom-image include_tasks filename

Ensure the custom-image.yml task is included when using custom OS image
path. Fixes typo.

Fixes: ad8cf5b ("Add a base-image role")
Signed-off-by: Daniel Gomez <[email protected]>

Author: dkruces

playbooks/roles/base_image/tasks/main.yml

@@ -8,7 +8,7 @@
 
 - name: Create custom upstream OS image
   ansible.builtin.include_tasks:
-    file: "{{ role_path }}/tasks/custom_image.yml"
+    file: "{{ role_path }}/tasks/custom-image.yml"
   when:
     - guestfs_has_custom_raw_image|bool