fdsreader Module, DEVC data and meta information

In the section [fdsreader Module](https://github.com/FireDynamics/LectureFireSimulation/blob/8b1f6f71e2891dc4e33020b688bae29c7c807863/book/content/tools/03_analysis/02_fdsreader.ipynb), I get the following error message with fdsreader `1.2.1`

```python
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
in
1 for i in devc:
----> 2 print(f"ID: {devc[i].id},\t quantity: {devc[i].quantity.quantity},\t position: {devc[i].position}")

AttributeError: 'Quantity' object has no attribute 'quantity'
```

for

```python
for i in devc:
print(f"ID: {devc[i].id},\t quantity: {devc[i].quantity.quantity},\t position: {devc[i].position}")
```

Shouldn't it be?
```python
for i in devc:
print(f"ID: {devc[i].id},\t quantity: {devc[i].quantity.name},\t position: {devc[i].position}")
```