lspconfig: fix deprecated method

lua/custom/lsp.lua

@@ -1,5 +1,3 @@
-local lspconfig = require("lspconfig")
-
 local keymap = vim.keymap
 
 local capabilities = nil
@@ -147,7 +145,7 @@ for name, config in pairs(servers) do
     capabilities = capabilities,
   }, config)
 
-  lspconfig[name].setup(config)
+  vim.lsp.config[name] = config
 end
 
 -- Here it is used the LSP server attaches to file