nvimrc: Update rust_analyzer config

nvimrc

@@ -766,6 +766,7 @@ nvim_lsp.gopls.setup{
 
 -- Rust
 nvim_lsp.rust_analyzer.setup{
+  capabilities = capabilities,
   on_attach = on_attach,
     settings = {
         ["rust-analyzer"] = {
@@ -781,8 +782,11 @@ nvim_lsp.rust_analyzer.setup{
                 },
             },
             procMacro = {
-                enable = true
+                enable = false,
             },
+            diagnostics = {
+              disabled = { "unresolved-proc-macro" },
+            }
         }
     }
 }