Typo in the progress report

Thanks for this very nice tool!
I was playing with it when I stumbled in what I think is a typo prompted while the repository is analysed:
```



Analyzing commit history with 2 processes              :  20%|████████▊                                   | 256/1271 [16:10<1:36:28,  5.70s/ Commits]
```
I think it should perhaps be `5.70 Commits/s`