vscode: don't lint css through VSCode (rely on stylint and Tailwind extension)

.vscode/settings.json

@@ -1,4 +1,5 @@
 {
+  "css.validate": false,
   "editor.insertSpaces": true,
   "editor.tabSize": 2,
   "files.associations": {
@@ -15,5 +16,6 @@
       "fileMatch": ["renovate.json"],
       "url": "https://docs.renovatebot.com/renovate-schema.json"
     }
-  ]
+  ],
+  "scss.validate": false
 }