fix(typo): fix language server name typo in config example (#3176)

utils/installer/config.example.lua

@@ -92,7 +92,7 @@ lvim.builtin.treesitter.highlight.enable = true
 
 -- -- make sure server will always be installed even if the server is in skipped_servers list
 -- lvim.lsp.installer.setup.ensure_installed = {
---     "sumeko_lua",
+--     "sumneko_lua",
 --     "jsonls",
 -- }
 -- -- change UI setting of `LspInstallInfo`