revert(update): bun install only on copy, a task in update merges two lockfiles into conflicts

copier.yml

@@ -58,4 +58,4 @@ prefix:
   default: "{{ 'frontend/' if layout == 'part' else '' }}"
 
 _tasks:
-  - "{% if install_deps %}sh -c 'cd {{ part_dir }} && bun install'{% else %}true{% endif %}"
+  - "{% if _copier_operation == 'copy' and install_deps %}sh -c 'cd {{ part_dir }} && bun install'{% else %}true{% endif %}"