cfg_name and repo

`In the following example CFG_NAME and BUCKET_NAME need to be changed to specifics for the rclone configuration you created:`

Just curious on what these values should be created a rclone configed called `nextcloud`.

Thanks!

Locate the documentation passage containing CFG_NAME and BUCKET_NAME, then compare those placeholders with the reporter’s rclone configuration named nextcloud. Clarify what each value should contain and update the example so a reader can configure the backup without guessing.

Written by the indexing model from the issue text.