docs(add-bond-invoice): use short flags in the reply hint

The inbound bond-payout hint printed the long flag `--orderid` (correct,
since the Commands enum's `rename_all = "lower"` renames `order_id` to
`--orderid`), but the unusual form is easy to misread. Switch the hint to
the short `-o`/`-i` flags, which are unambiguous and match the README's
convention for these commands.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: grunch

src/parser/dms.rs

@@ -145,7 +145,7 @@ fn handle_add_bond_invoice_request_display(
     println!("💡 A bond on this trade was slashed; you can claim your share.");
     println!("💡 Reply before the deadline with a Lightning invoice for the amount above:");
     println!(
-        "   mostro-cli addbondinvoice --orderid {} --invoice <bolt11>",
+        "   mostro-cli addbondinvoice -o {} -i <bolt11>",
         req.order
             .id
             .map(|x| x.to_string())