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}")
```

Open book/content/tools/03_analysis/02_fdsreader.ipynb and inspect the fdsreader Module section. Run the shown DEVC loop with fdsreader 1.2.1 to reproduce the AttributeError, then verify the corrected metadata expression produces the intended quantity information without an error.

Written by the indexing model from the issue text.