Update README.md

Author: bastgau

README.md

@@ -6,12 +6,14 @@
 
 # devcontainer-python
 
+
 ## Linters & tools
 
 > Linters are programs that advise about code quality by displaying warnings and errors.
 
 By default, the following linters and tools are installed and configured:
 
+- [Flake8](https://github.com/pycqa/flake8/)
 - [Mypy](https://mypy.readthedocs.io/en/stable/)
 - [Pylama](https://klen.github.io/pylama/)
 - [Pylint](https://pylint.pycqa.org/en/latest/)
@@ -22,7 +24,7 @@ Don't hesitate to share with me your own configuration.
 
 ## VSCode extensions
 
-The following extension is recommanded:
+The following extensions are recommanded:
 
 - [AutoDocstring - Python Docstring Generator](https://marketplace.visualstudio.com/items?itemName=njpwerner.autodocstring)
 - [Prettify JSON](https://marketplace.visualstudio.com/items?itemName=mohsen1.prettify-json)