Update prefix for tmp image-build inventory

Author: m-bull

roles/image_build/tasks/main.yml

@@ -11,7 +11,7 @@
 - name: Create temporary image-build inventory directory
   ansible.builtin.tempfile:
     state: directory
-    prefix: image-build
+    prefix: image-build.
   register: image_build_inventory
 
 - name: Symlink "everything" layout to image-build inventory