Merge bitcoindevkit/bdk#1789: Change default tx to version 2 #6596

Job	Run time
prepare	2s
Rust fmt	13s
Build and test (1.83.0, true, --no-default-features --features miniscript/no-std)	1s
Build & Test Examples (example_cli)	15s
Build and test (1.83.0, true, --all-features)	1s
Check no_std	25s
Check WASM	31s
Build & Test Examples (example_bitcoind_rpc_polling)	34s
Build and test (1.63.0, --no-default-features --features miniscript/no-std)	1s
Build & Test Examples (example_electrum)	54s
Build and test (1.63.0, --all-features)	27s
Build & Test Examples (example_esplora)	54s
clippy_check	32s
Build & Test Examples (example_wallet_electrum)	56s
Build & Test Examples (example_wallet_esplora_async)	1m 0s
Build & Test Examples (example_wallet_esplora_blocking)	48s
Build & Test Examples (example_wallet_rpc)	30s
	8m 4s

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