fix(vi-mode): use system clipboard also for `vi-delete-char` (#10820)

plugins/vi-mode/vi-mode.plugin.zsh

@@ -119,7 +119,7 @@ function wrap_clipboard_widgets() {
   done
 }
 
-wrap_clipboard_widgets copy vi-yank vi-yank-eol vi-backward-kill-word vi-change-whole-line vi-delete
+wrap_clipboard_widgets copy vi-yank vi-yank-eol vi-backward-kill-word vi-change-whole-line vi-delete vi-delete-char
 wrap_clipboard_widgets paste vi-put-{before,after}
 unfunction wrap_clipboard_widgets