Markdown pane does not render latex without adding "mathjax" to pn.extension

[MarcSkovMadsen]

I'm on Panel 0.13 trying out the new functionality. I cannot get it working.

import panel as pn

pn.extension(sizing_mode="stretch_width")

pn.pane.Markdown("""
- Markdown panes now support $$LaTeX$$
- To render a snippet with LaTeX add two $ delimiters
- e.g. $$\sum_{j}{\sum_{i}{a*w_{j, i}}}$$
""", width=800).servable()

looks like

Additional Context

If I add mathjax to pn.extension, I can get it working. But its not documented in the blog post https://blog.holoviz.org/panel_0.13.0.html or in the reference notebook https://panel.holoviz.org/reference/panes/Markdown.html

import panel as pn

pn.extension("mathjax", sizing_mode="stretch_width")

pn.pane.Markdown("""
## Markdown $$LaTeX$$ support

The Markdown pane supports math rendering for string encapsulated with double $ delimiters: $$\sum_{j}{\sum_{i}{a*w_{j, i}}}$$
""", width=800).servable()