Replace archived ruby vscode extension

`rebornix.Ruby` is archived on Aug 1, 2023 (https://github.com/rubyide/vscode-ruby?tab=readme-ov-file#deprecated).
`Shopify.ruby-lsp` is recommended instead.

moduleroot/.vscode/extensions.json

@@ -1,6 +1,6 @@
 {
   "recommendations": [
     "puppet.puppet-vscode",
-    "rebornix.Ruby"
+    "Shopify.ruby-lsp"
   ]
 }