docs(python): Hint about ruff setting in VSCode (pola-rs#13421)

Co-authored-by: Stijn de Gooijer <[email protected]>

docs/development/contributing/ide.md

@@ -5,7 +5,9 @@ This page contains some recommendations for configuring popular IDEs.
 
 ## Visual Studio Code
 
-The following extensions are recommended.
+Make sure to configure VSCode to use the virtual environment created by the Makefile.
+
+In addition, the extensions below are recommended.
 
 ### rust-analyzer
 
@@ -23,6 +25,14 @@ For it to work well for the Polars code base, add the following settings to your
 
 The Ruff extension will help you conform to the formatting requirements of the Python code.
 We use both the Ruff linter and formatter.
+It is recommended to configure the extension to use the Ruff installed in your environment.
+This will make it use the correct Ruff version and configuration.
+
+```json
+{
+    "ruff.importStrategy": "fromEnvironment",
+}
+```
 
 ## PyCharm / RustRover / CLion