fix math render as submodule

.gitignore

@@ -5,3 +5,4 @@ pelican.pid
 srv.pid
 blog_limos.egg-info
 node_modules
+venv

.gitmodules

+[submodule "plugins/math_render"]
+	path = plugins/math_render
+	url = https://github.com/barrysteyn/pelican_plugin-render_math.git

README.md

@@ -3,6 +3,7 @@
 
 ```bash
 sudo pip install --editable .
+git submodule update --recursive --remote
 ```
 
 ## Lancer le serveur de prévisualisation

math_render @ 4aa206ed

-Subproject commit 2bb931abf47ed1b23da0c6ae41f82149b132c49f
+Subproject commit 4aa206eda5af3626203b80062e0d2fbe3971fd82