a separate bug page for the mystmd issue

Author: parmentelat

notebooks/2-05-xrefs-nb.md

@@ -35,8 +35,6 @@ import numpy as np
 import matplotlib.pyplot as plt
 ```
 
-+++ {"jp-MarkdownHeadingCollapsed": true}
-
 ### the source cell
 
 we put a label `the-labeled-plot` on the following code cell

notebooks/2-06-mystmdbug.md

@@ -0,0 +1,31 @@
+---
+jupytext:
+  formats: md:myst
+  text_representation:
+    extension: .md
+    format_name: myst
+kernelspec:
+  name: python3
+  display_name: Python 3 (ipykernel)
+  language: python
+language_info:
+  name: python
+  pygments_lexer: ipython3
+  nbconvert_exporter: python
+---
+
+# mystmd xref bug reproduction
+
++++
+
+## define a cell with a label
+
+```{code-cell} ipython3
+#| label: the-label
+
+print("hello world")
+```
+
+## embed the content
+
+[hover here to see the output of the labeled cell i.e. `hello world`](#the-label)