Describe how to retry restoring when encountering `RestoreCollision` error

[TD-Sky]

Original idea comes from https://github.com/Byron/trash-rs/pull/65#issuecomment-1664109338 .

[Byron]

My apologies for the late response! Somehow the email notification that I should have received made it past my inbox.

Thanks a lot for this improvement - it will be released momentarily.

[Byron]

The improvement is now available in the new release.