Update bash-completion file for shtab 1.8.0

Author: blockstreamsatellite

blocksat-cli.bash-completion

@@ -533,6 +533,7 @@ _shtab_blocksatcli() {
 
       if [[ "$current_action_nargs" != "*" ]] && \
          [[ "$current_action_nargs" != "+" ]] && \
+         [[ "$current_action_nargs" != "?" ]] && \
          [[ "$current_action_nargs" != *"..." ]] && \
          (( $word_index + 1 - $current_action_args_start_index - $pos_only >= \
             $current_action_nargs )); then