Add temporary change in comment of Bank contract to test the workflow

The change needs to be reverted before merge to `main`. It's only added to test
pushing of PRs with API docs after changes in contracts.

solidity/contracts/bank/Bank.sol

@@ -20,7 +20,7 @@ import "@openzeppelin/contracts/access/Ownable.sol";
 import "./IReceiveBalanceApproval.sol";
 import "../vault/IVault.sol";
 
-/// @title Bitcoin Bank
+/// @title Bitcoin Bank TEST
 /// @notice Bank is a central component tracking Bitcoin balances. Balances can
 ///         be transferred between balance owners, and balance owners can
 ///         approve their balances to be spent by others. Balances in the Bank