ConsoleRenderer: When colors=False, set monochrome output for RichTracebackFormatter

Author: funkyfuture

src/structlog/dev.py

@@ -698,7 +698,7 @@ def add_meaningless_arg(arg: str) -> None:
         if not colors and exception_formatter is rich_traceback:
             cast(
                 RichTracebackFormatter, exception_formatter
-            ).color_sytem = None
+            ).color_system = None
 
         if repr_native_str is not False:
             add_meaningless_arg("repr_native_str")