wget error in pm2-notebook-jannis.ipynb

In cell 2 of [pm2-notebook-jannis.ipynb](../blob/main/PM2/pm2-notebook-jannis.ipynb)
```python3
growth_read = read_r(wget("https://github.com/CausalAIBook/MetricsMLNotebooks/blob/main/data/GrowthData.rda?raw=true"))
```
should be
```python3
growth_read = read_r(wget.download("https://github.com/CausalAIBook/MetricsMLNotebooks/blob/main/data/GrowthData.rda?raw=true"))
```