docs(plugins): Just inline tabs

Author: tony

docs/plugin_system.md

@@ -12,20 +12,24 @@ your tmuxp configuration file.
 
 ### Example Configurations
 
-#### YAML
+````{tab} YAML
 
 ```{literalinclude} ../examples/plugin-system.yaml
 :language: yaml
 
 ```
 
-#### JSON
+````
+
+````{tab} JSON
 
 ```{literalinclude} ../examples/plugin-system.json
 :language: json
 
 ```
 
+````
+
 [poetry]: https://python-poetry.org/
 
 ## Developing a Plugin