nvim: add link to bug for hover problem

.config/nvim/lua/my/lsp.lua

@@ -59,7 +59,7 @@ local on_attach = function(client, bufnr)
         }, bufnr)
     end
 
-    -- -- show help on hover
+    -- -- show help on hover (<https://github.com/neovim/neovim/issues/20457>)
     -- if client.server_capabilities.hoverProvider then
     --     vim.api.nvim_create_autocmd({ 'CursorHold', 'CursorHoldI' }, {
     --         group = 'config_lsp',
@@ -101,7 +101,7 @@ local simple_ls = {
     ['yaml-language-server'] = 'yamlls',
     ['docker-langserver'] = 'dockerls',
 }
-for exe,ls in pairs(simple_ls) do
+for exe, ls in pairs(simple_ls) do
     if vim.fn.executable(exe) > 0 then
         lspconfig[ls].setup({
             on_attach = on_attach,