contrib: Set our check command to check instead of clippy

Clippy is a bit too heavy to be used as the check on save command in
this repo.

Let's set a better default.

Author: poljar

contrib/ide/vscode/settings.json

@@ -1,4 +1,4 @@
 {
-  "rust-analyzer.checkOnSave.command": "clippy",
+  "rust-analyzer.checkOnSave.command": "check",
   "rust-analyzer.rustfmt.extraArgs": ["+nightly"]
 }