Fix comment about mini.ai example (nvim-lua#985)

This example wasn't using `'` so this makes more sense

Author: rmacklin

init.lua

@@ -880,7 +880,7 @@ require('lazy').setup({
       -- 2
       -- Examples:
       --  - va)  - [V]isually select [A]round [)]paren
-      --  - yinq - [Y]ank [I]nside [N]ext [']quote
+      --  - yinq - [Y]ank [I]nside [N]ext [Q]uote
       --  - ci'  - [C]hange [I]nside [']quote
       require('mini.ai').setup { n_lines = 500 }