zsh completion: fix error in qfinish completions from 88a82069be4a

The actual flag is --applied, not --all.

contrib/zsh_completion

@@ -882,7 +882,7 b' typeset -A _hg_cmd_globals'
 
 _hg_cmd_qfinish() {
   _arguments -s -w : $_hg_global_opts \
-  '(--all -a)'{-a,--all}'[finish all patches]' \
+  '(--applied -a)'{-a,--applied}'[finish all applied patches]' \
   '*:patch:_hg_qapplied'
 }