Add context in doc

python/core/auto_generated/layertree/qgslayertreemodellegendnode.sip.in

@@ -102,6 +102,7 @@ Entry point called from QgsLegendRenderer to do the rendering in a
 JSON object.
 
 :param settings: Legend layout configuration
+:param context: Rendering context
 :param json: The json object to update
 
 .. versionadded:: 3.8
@@ -123,6 +124,7 @@ Draws symbol on the left side of the item
 Adds a symbol in base64 string within a JSON object with the key "icon".
 
 :param settings: Legend layout configuration
+:param context: Rendering context
 :param json: The json object to update
 
 .. versionadded:: 3.8

src/core/layertree/qgslayertreemodellegendnode.h

@@ -114,6 +114,7 @@ class CORE_EXPORT QgsLayerTreeModelLegendNode : public QObject
      * Entry point called from QgsLegendRenderer to do the rendering in a
      * JSON object.
      * \param settings Legend layout configuration
+     * \param context Rendering context
      * \param json The json object to update
      * \since QGIS 3.8
      */
@@ -131,6 +132,7 @@ class CORE_EXPORT QgsLayerTreeModelLegendNode : public QObject
     /**
      * Adds a symbol in base64 string within a JSON object with the key "icon".
      * \param settings Legend layout configuration
+     * \param context Rendering context
      * \param json The json object to update
      * \since QGIS 3.8
      */