docs: fix syntax errors in examples #38606

(cherry picked from commit 2dce2af768)

runtime/lua/vim/lsp.lua

@@ -184,7 +184,7 @@ end
 --- })
 --- vim.lsp.config('…', {
 ---   filetypes = { 'my_filetype1', 'my_filetype2' },
---- }
+--- })
 --- ```
 --- @field filetypes? string[]
 ---