docs: add data pops in ContentRendererMarkdown

Author: maximepvrt

docs/content/4.components/2.content-renderer.md

@@ -23,6 +23,9 @@ Other types will currently be passed to default slot via `v-slot="{ data }"` or
 - `components`: The map of custom components to use for rendering. This prop will pass to markdown renderer and will not affect other file types.
   - Type: `object`
   - Default: `{}`
+- `data`: A map of variables to inject into the markdown content for later use in binding variables.
+  - Type: `object`
+  - Default: `{}`
 
 ## Slots