fix: aptos move compile for 0.3.1

[munanadi]

aptos move compile was failing due to improper destructuring of values from coin::initialize from here shown below

    public fun initialize<CoinType>(
        account: &signer,
        name: string::String,
        symbol: string::String,
        decimals: u8,
        monitor_supply: bool,
    ): (BurnCapability<CoinType>, FreezeCapability<CoinType>, MintCapability<CoinType>) {
        initialize_internal(account, name, symbol, decimals, monitor_supply, false)
    }

$ aptos move compile
error[E04007]: incompatible types
    ┌─ /home/aadhi/Desktop/tutorial-lending/sources/lending.move:422:13
    │
422 │         let (btc_cap, btc_burn) = coin::initialize<FakeBTC>(admin, copy name, copy name, 0, false);
    │             ^^^^^^^^^^^^^^^^^^^
    │             │
    │             Invalid value for binding
    │             Expected expression list of length 2: '(_, _)'
    │
    ┌─ /home/aadhi/.move/https___github_com_aptos-labs_aptos-core_git_3910637893b6aed4af73b19a2c429ef717e1ee26/aptos-move/framework/aptos-framework/sources/coin.move:313:8
    │
313 │     ): (BurnCapability<CoinType>, FreezeCapability<CoinType>, MintCapability<CoinType>) {
    │        -------------------------------------------------------------------------------- Given expression list of length 3: '((aptos_framework=0x1)::coin::BurnCapability<(hippo_tutorial=0xA61E1E86E9F596E483283727D2739BA24B919012720648C29380F9CD0A96C11A)::lend2::FakeBTC>, (aptos_framework=0x1)::coin::FreezeCapability<(hippo_tutorial=0xA61E1E86E9F596E483283727D2739BA24B919012720648C29380F9CD0A96C11A)::lend2::FakeBTC>, (aptos_framework=0x1)::coin::MintCapability<(hippo_tutorial=0xA61E1E86E9F596E483283727D2739BA24B919012720648C29380F9CD0A96C11A)::lend2::FakeBTC>)'