Fix README.md example output

[seanwatson]

Looks like there's a copy paste error in one of the examples in the README file. Running the example command for real does what you'd expect it too:

> tree
.
├── file-01.txt
├── file-02.txt
├── file-03.txt
└── one
    ├── file-01.txt
    ├── file-02.txt
    └── file-03.txt

1 directory, 6 files
> rnr -f file renamed ./file-01.txt ./one/file-02.txt ./one/file-03.txt
./one/file-03.txt -> ./one/renamed-03.txt
./one/file-02.txt -> ./one/renamed-02.txt
./file-01.txt -> ./renamed-01.txt
> tree
.
├── file-02.txt
├── file-03.txt
├── one
│   ├── file-01.txt
│   ├── renamed-02.txt
│   └── renamed-03.txt
├── renamed-01.txt
└── rnr-2020-07-17_213630.json

1 directory, 7 files

[ismaelgv]

Thank you very much for the contribution @seanwatson !