Assign ctags symbols browser to Alt-Q instead of ctrl-k

The key is already bound to push-line, however the zle widget
has also two other keys, ctrl-q and Alt-q, so no problem, as
IMO users who want that widget already use Alt-q, not Alt-Q.

zinit.zsh

@@ -3265,6 +3265,7 @@ zle -N zi-browse-symbol
 zle -N zi-browse-symbol-backwards zi-browse-symbol
 zle -N zi-browse-symbol-pbackwards zi-browse-symbol
 zle -N zi-browse-symbol-pforwards zi-browse-symbol
-bindkey "^K" zi-browse-symbol
+zstyle -s ':zinit:browse-symbol' key ZINIT_TMP || ZINIT_TMP='\eQ'
+[[ -n $ZINIT_TMP ]] && bindkey $ZINIT_TMP zi-browse-symbol
 
 # vim:ft=zsh:sw=4:sts=4:et:foldmarker=[[[,]]]:foldmethod=marker