ci: apply `zizmor` security audit #6690

Job	Run time
prepare	3s
Check no_std	33s
Check WASM	58s
Build & Test Examples (example_cli)	36s
Build & Test (1.84.0, true, --no-default-features --features miniscript/no-std)	2m 9s
Build & Test Examples (example_bitcoind_rpc_polling)	35s
Rust clippy	58s
Build & Test (1.84.0, true, --all-features)	3m 45s
Build & Test Examples (example_electrum)	59s
Rust fmt	13s
Build & Test (1.63.0, --no-default-features --features miniscript/no-std)	2m 55s
Build & Test Examples (example_esplora)	1m 0s
Build & Test (1.63.0, --all-features)	4m 9s
Build & Test Examples (example_wallet_electrum)	55s
Build & Test (1.75.0, --no-default-features --features miniscript/no-std)	2m 24s
Build & Test Examples (example_wallet_esplora_async)	1m 2s
Build & Test (1.75.0, --all-features)	4m 0s
Build & Test Examples (example_wallet_esplora_blocking)	53s
Build & Test Examples (example_wallet_rpc)	41s
	28m 48s

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