vim-patch:f7deb81: runtime(doc): fix typo at :h cmdline-autocompletion

The '?' needs to be escaped, because the autocommand is using
file-patterns (glob like) and not a regex). See :h file-pattern

closes: vim/vim#17890

f7deb815b0

Co-authored-by: Girish Palya <girishji@gmail.com>

src/nvim/eval.lua

@@ -13095,7 +13095,7 @@ M.funcs = {
       				*cmdline-autocompletion*
       Example: To make the completion menu pop up automatically as
       you type on the command line, use: >vim
-      	autocmd CmdlineChanged [:/?] call wildtrigger()
+      	autocmd CmdlineChanged [:/\?] call wildtrigger()
       	set wildmode=noselect:lastused,full wildoptions=pum
       <
       To retain normal history navigation (up/down keys): >vim