Typo on the documentation

Hi,

There is a typo on the documentation: https://empanada.readthedocs.io/en/latest/_sources/faq/index.rst.txt

Instead of 
```bash
pip install empanada-napari=1.1.1
```
It should be:
 
```bash
pip install empanada-napari==1.1.1
```

Best
Benjamin