nixpkgs/neovim: fix missed rename tsserver -> ts_ls

.config/nixpkgs/neovim/mappings.lua

@@ -104,7 +104,7 @@ vim.api.nvim_create_autocmd('LspAttach', {
     vim.keymap.set('n', 'gr', '<cmd>Telescope lsp_references<CR>', opts)
     vim.keymap.set('n', '<Leader>fs', '<cmd>Telescope lsp_document_symbols<CR>', opts)
 
-    if client.name == 'tsserver' then
+    if client.name == 'ts_ls' then
       -- exclude import statements from reference search (may have false positives)
       vim.keymap.set('n', 'gr', '<cmd>Telescope lsp_references default_text=!import\\ <CR>', opts)
       vim.keymap.set('n', 'gD', '<cmd>Telescope lsp_definitions<CR>', opts)