"Find" with rg searching by path name and not STRING inside file name.

- [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

I have this in my init.vim:

```
" Searches by file name and string inside file
command! -bang -nargs=* -complete=dir Find
\ call fzf#vim#grep(
\ 'rg '.shellescape(), 1,
\ 0 ? fzf#vim#with_preview()
\ : fzf#vim#with_preview(),
\ 0)
```

At one point, doing `:Find` allows me to enter in a string in the FZF prompt and it will output a list of files which contain the string.

Right now, the current behaviour is outputting the list of files where the path matches the string. Inside the file there may or may not be the string I am looking for.

Any help would be appreciated.