fixed article migration : body & field_source

web/modules/custom/materio_migrate/config/install/migrate_plus.migration.d7_node_article.yml

@@ -37,7 +37,7 @@ process:
     default_value: 'migration_imported'
   body:
     plugin: iterator
-    source: field_description
+    source: body
     process:
       value: value
       format:
@@ -94,7 +94,13 @@ process:
         title: title
         height: height
         width: width
-
+  field_source:
+    plugin: iterator
+    source: field_source
+    process:
+      uri: url
+      title: title
+      options: attributes
 
 migration_dependencies:
   required: