Update README.md for isort changes (#20787)

Updating the README to reflect isort not being installed by default

README.md

@@ -9,7 +9,7 @@ The Python extension does offer [some support](https://github.com/microsoft/vsco
 
 ## Installed extensions
 
-The Python extension will automatically install the [Pylance](https://marketplace.visualstudio.com/items?itemName=ms-python.vscode-pylance), [Jupyter](https://marketplace.visualstudio.com/items?itemName=ms-toolsai.jupyter) and [isort](https://marketplace.visualstudio.com/items?itemName=ms-python.isort) extensions to give you the best experience when working with Python files and Jupyter notebooks. However, Pylance is an optional dependency, meaning the Python extension will remain fully functional if it fails to be installed. You can also [uninstall](https://code.visualstudio.com/docs/editor/extension-marketplace#_uninstall-an-extension) it at the expense of some features if you’re using a different language server.
+The Python extension will automatically install the [Pylance](https://marketplace.visualstudio.com/items?itemName=ms-python.vscode-pylance) and [Jupyter](https://marketplace.visualstudio.com/items?itemName=ms-toolsai.jupyter) extensions to give you the best experience when working with Python files and Jupyter notebooks. However, Pylance is an optional dependency, meaning the Python extension will remain fully functional if it fails to be installed. You can also [uninstall](https://code.visualstudio.com/docs/editor/extension-marketplace#_uninstall-an-extension) it at the expense of some features if you’re using a different language server.
 
 Extensions installed through the marketplace are subject to the [Marketplace Terms of Use](https://cdn.vsassets.io/v/M146_20190123.39/_content/Microsoft-Visual-Studio-Marketplace-Terms-of-Use.pdf).
 
@@ -80,7 +80,9 @@ Learn more about the rich features of the Python extension:
 
 -   [Environments](https://code.visualstudio.com/docs/python/environments): Automatically activate and switch between virtualenv, venv, pipenv, conda and pyenv environments
 
--   [Refactoring](https://code.visualstudio.com/docs/python/editing#_refactoring): Restructure your Python code with variable extraction, method extraction and import sorting
+-   [Refactoring](https://code.visualstudio.com/docs/python/editing#_refactoring): Restructure your Python code with variable extraction and method extraction. Additionally, there is componentized support to enable additional refactoring, such as import sorting, through extensions including [isort](https://marketplace.visualstudio.com/items?itemName=ms-python.isort) and [Ruff](https://marketplace.visualstudio.com/items?itemName=charliermarsh.ruff). 
+
+
 
 ## Supported locales
 

build/license-header.txt

@@ -3,9 +3,6 @@ PLEASE NOTE: This is the license for the Python extension for Visual Studio Code
  - The Jupyter extension is released under an MIT License:
   https://marketplace.visualstudio.com/items/ms-toolsai.jupyter/license
 
- - The isort extension is released under an MIT License:
-  https://marketplace.visualstudio.com/items/ms-python.isort/license
-
  - The Pylance extension is only available in binary form and is released under a Microsoft proprietary license, the terms of which are available here:
   https://marketplace.visualstudio.com/items/ms-python.vscode-pylance/license