ignore async-trait rust proc macro warning

lua/plugins/rust.lua

@@ -0,0 +1,16 @@
+return {
+  "mrcjkb/rustaceanvim",
+  opts = {
+    server = {
+      default_settings = {
+        ["rust-analyzer"] = {
+          procMacro = {
+            ignored = {
+              ["async-trait"] = vim.NIL,
+            },
+          },
+        },
+      },
+    },
+  },
+}