Copy the checksum to the folder correctly

Currently the checksum copies to the target as
the name 'venv', rather than as the full checksum
file name. This is due to the target not explicitly
being set as a folder, so ansible thinks it's the
file name.

Change-Id: I99124ac9c602b04db89f875d5c8859faa487cf03

tasks/python_venv_install.yml

@@ -16,7 +16,7 @@
 - name: Copy the venv checksum file to the target host
   copy:
     src: "{{ venv_reuse_download_path }}/{{ venv_destination_path | basename }}.checksum"
-    dest: "{{ venv_destination_path | dirname }}"
+    dest: "{{ venv_destination_path | dirname }}/"
   register: _venv_checksum_copy
   when:
     - _src_venv_present.stat.exists | bool