updated docs

Signed-off-by: Dibri Nsofor <[email protected]>

Author: dibrinsofor

docs/source/command_line.rst

@@ -888,6 +888,11 @@ in developing or debugging mypy internals.
     This flag will invoke the Python debugger when mypy encounters
     a fatal error.
 
+.. option:: --plugins {MODULE|PLUGIN_FILE} ...
+
+    This flag acts as a supplementary way to pass (a list of) plugins to customize 
+    Mypy's type checking approach. See :ref:`extending-mypy` for more details.
+
 .. option:: --show-traceback, --tb
 
     If set, this flag will display a full traceback when mypy