cookbook: Upgrade to latest bitcoin 0.32.0

[tcharding]

Upgrade the cookbook to use the latest release of rust-bitcoin.

[apoelstra]

utACK bd4391e

[tcharding]

Are you watching this repo @storopoli? I'll wait a few days before merge in case you wanted to review. Thanks.

[storopoli]

No, I'm not but I will. Give me until tomorrow for a review? Thanks for the tagging.

[tcharding]

No rush man, take your time.

[storopoli]

I was going through the examples yesterday (wasn't aware of this PR) and I've seen that there's an uncommented line in

rust-bitcoin.github.io/cookbook/src/tx_taproot.md

Lines 137 to 148 in bd4391e

	```rust
	# use std::str::FromStr;
	#
	# use bitcoin::hashes::Hash;
	# use bitcoin::key::{Keypair, TapTweak, TweakedKeypair, UntweakedPublicKey};
	# use bitcoin::locktime::absolute;
	# use bitcoin::secp256k1::{rand, Message, Secp256k1, SecretKey, Signing, Verification};
	# use bitcoin::sighash::{Prevouts, SighashCache, TapSighashType};
	# use bitcoin::{
	# transaction, Address, Amount, Network, OutPoint, ScriptBuf, Sequence, Transaction, TxIn, TxOut,
	Txid, Witness,
	# };

see the Txid, Witness,.

Do we fix it in this PR or a different one?

EDIT: Done in #27.

[storopoli]

ACK bd4391e

[tcharding]

Oh process fail, I can't ack this after the force push so can't merge it - my bad. Re-ack please @apoelstra or @storopoli, then i'll merge.

I rebased to pick up #27, I should not have done that, I'm used to Andrew doing the merging.

[apoelstra]

utACK 54b68a5

[storopoli]

ACK 54b68a5