fix(enable_clippy): use correct rust-analyzer config key

The correct config key for a rust-analyzer check command table is `check`. `checkOnSave` is a boolean
 (there are some hints in the manual that `checkOnSave` as a table is aliased to `check` but even if it is the correct key is `check`)

this prevents incorrect config conflicts downstream

lua/rustaceanvim/config/server.lua

@@ -22,13 +22,15 @@ function server.load_rust_analyzer_settings(project_root, opts)
   local default_settings = opts.default_settings or config.server.default_settings
   local use_clippy = config.tools.enable_clippy and vim.fn.executable('cargo-clippy') == 1
   ---@diagnostic disable-next-line: undefined-field
-  if default_settings['rust-analyzer'].checkOnSave == nil and use_clippy then
+  if default_settings['rust-analyzer'].check == nil and use_clippy then
     ---@diagnostic disable-next-line: inject-field
-    default_settings['rust-analyzer'].checkOnSave = {
+    default_settings['rust-analyzer'].check = {
       allFeatures = true,
       command = 'clippy',
       extraArgs = { '--no-deps' },
     }
+    ---@diagnostic disable-next-line: inject-field
+    default_settings['rust-analyzer'].checkOnSave = true
   end
   if not project_root then
     return default_settings