added blank line after manage transaction costs page tag

Author: TinaKT

source/mainnet/docs/concordium-id/verify-and-access/manage-transaction-costs.rst

@@ -1,4 +1,5 @@
 .. _manage-transaction-costs:
+
 =========================
 Manage transaction costs
 =========================
@@ -29,4 +30,5 @@ Manage your wallet actively
 
 Because CCD is required for all actions, you must treat this wallet as a form of operational capital that needs active management. You must consistently monitor your wallet's CCD balance and ensure it is topped up regularly.
 
+**Important:** If your CCD balance runs out, all your subsequent operations will fail. This could halt your compliance checks, disrupt your services, and prevent you from paying for network usage.