Update Readme with link to python-lsp-ruff and mention to code actions (#312)

Author: jhossbach

README.md

@@ -80,6 +80,7 @@ Installing these plugins will add extra functionality to the language server:
 - [python-lsp-black](https://github.com/python-lsp/python-lsp-black): code formatting using [Black](https://github.com/psf/black).
 - [pyls-memestra](https://github.com/QuantStack/pyls-memestra): detecting the use of deprecated APIs.
 - [pylsp-rope](https://github.com/python-rope/pylsp-rope): Extended refactoring capabilities using [Rope](https://github.com/python-rope/rope).
+- [python-lsp-ruff](https://github.com/python-lsp/python-lsp-ruff): Extensive and fast linting using [ruff](https://github.com/charliermarsh/ruff).
 
 Please see the above repositories for examples on how to write plugins for the Python LSP Server.
 
@@ -142,6 +143,7 @@ pip install 'python-lsp-server[websockets]'
 * Auto Completion
 * [Autoimport](docs/autoimport.md)
 * Code Linting
+* Code actions
 * Signature Help
 * Go to definition
 * Hover