How to suppress (hide) portion of filename?

I'm using fzf.vim to help me quickly find files in my personal wiki, and it's a huge help -- thanks, junegunn.

My files are named things like:

```
20201110_wan that aprile.md
20201113_to be or not to be.md
20201114_four score.md
```

but I don't need to see (or search) the date at the beginning of the filenames.

Is there a way I can update my fzf.vim's `Files:` command to hide the date (and proceeding underscore) when I search for files?

- [x] I have fzf 0.23.0 or above
- [x] I have read through https://github.com/junegunn/fzf.vim/blob/master/README.md
- [x] I have read through https://github.com/junegunn/fzf/blob/master/README-VIM.md
- [x] I have read through the manual page of fzf (`man fzf`)
- [x] I have searched through the existing issues