Add ruff quote-style (#4368)

A super small PR that adds simple quotes settings for ruff to make sure
we stay in the correct coding style.

---------

Co-authored-by: Paula Kammler <paula@zauberzeug.com>

.vscode/settings.json

@@ -1,5 +1,4 @@
 {
-  "autopep8.args": ["--max-line-length=120"],
   "editor.defaultFormatter": "esbenp.prettier-vscode",
   "editor.formatOnSave": true,
   "prettier.printWidth": 120,

pyproject.toml

@@ -116,6 +116,9 @@ module = [
 ]
 ignore_missing_imports = true
 
+[tool.autopep8]
+max-line-length = 120
+
 [tool.ruff]
 target-version = "py38"
 indent-width = 4