Markdown built by MyST does NOT support code output

[rgaiacs]

myst build --force --md index.ipynb reports

📬 Performing exports:
   index.ipynb -> _build/exports/index.md
Loading project from path with no config file: /home/raniere/MethodsHub/minimal-example-ipynb-myst-python
Consider running "myst init --project" in that directory
📖 Built index.ipynb in 22 ms.
📖 Built README.md in 14 ms.
📖 Built CONTRIBUTING.MD in 13 ms.
📚 Built 3 pages for export (including 2 dependencies) from /home/raniere/MethodsHub/minimal-example-ipynb-myst-python in 42 ms.
⛔️ _build/exports/index.md Unsupported node type: output
⛔️ _build/exports/index.md Unsupported node type: output
⛔️ _build/exports/index.md Unsupported node type: output
📑 Exported MD in 51 ms, copying to _build/exports/index.md

The content of _build/exports/index.md is

---
title: Minimal Example of Tutorial in MyST (Markedly Structured Text)
authors:
  - name: Raniere Silva
---
+++
This example demonstrates the **required** metadata by [`methodshub`](https://github.com/GESIS-Methods-Hub/methodshub). The metadata must be placed in the first cell of the Jupyter Notebook. The first cell must be a `Markdown` cell. The metadata must be enclosed between `---`.

+++
(execution-of-python-code)=
## Execution of Python code

+++
```python
1 + 1
```



+++
(creation-of-figure-with-python)=
## Creation of figure with Python

+++
```python
import matplotlib.pyplot as plt
```



+++
```python
plt.plot([1,2,3]);
```