Use "universal" Python commmand

Co-authored-by: chrysle <fritzihab@posteo.de>

Author: jeanas

source/guides/installing-using-pip-and-virtual-environments.rst

@@ -118,7 +118,7 @@ filepath that includes the ``.venv`` directory, by ending with the following:
 
     .. code-block:: bat
 
-        .venv\Scripts\python.exe
+        .venv\Scripts\python
 
 
 While a virtual environment is activated, pip will install packages into that