Update README.md

Author: johanneskoester

README.md

@@ -42,6 +42,7 @@ class ReportSettings(ReportSettingsBase):
             "unparse_func": ...,
             # Optionally specify that setting is required when the reporter is in use.
             "required": True,
+            # Optionally specify multiple args with "nargs": True
         },
     )
 
@@ -61,4 +62,4 @@ class Reporter(ReporterBase):
     def render(self):
         # Render the report, using attributes of the base class.
         ...
-```
+```