build(deps): bump toml from 0.7.6 to 0.8.8 #4325

Job	Run time
bdk_test	3m 15s
build (x86_64-unknown-linux-gnu, ubuntu-latest)	4m 36s
docker_tests (happy_path)	2m 59s
build (armv7-unknown-linux-gnueabihf, ubuntu-latest)	5m 34s
docker_tests (happy_path_restart_bob_after_xmr_locked)	2m 49s
sqlx_test	4m 9s
build (x86_64-apple-darwin, macos-latest)	8m 5s
static_analysis	1m 4s
docker_tests (happy_path_restart_bob_before_xmr_locked)	2m 29s
build (x86_64-pc-windows-msvc, windows-latest)	7m 31s
docker_tests (happy_path_restart_alice_after_xmr_locked)	2m 28s
test (ubuntu-latest)	10m 2s
docker_tests (alice_and_bob_refund_using_cancel_and_refund_command)	2m 47s
test (macos-latest)	13m 59s
docker_tests (alice_and_bob_refund_using_cancel_then_refund_command)	2m 39s
docker_tests (alice_and_bob_refund_using_cancel_and_refund_command_timelock_not_expired)	2m 50s
docker_tests (punish)	2m 34s
docker_tests (alice_punishes_after_restart_bob_dead)	2m 54s
docker_tests (alice_manually_punishes_after_bob_dead)	2m 52s
docker_tests (alice_refunds_after_restart_bob_refunded)	3m 1s
docker_tests (ensure_same_swap_id)	2m 2s
docker_tests (concurrent_bobs_before_xmr_lock_proof_sent)	5m 53s
docker_tests (alice_manually_redeems_after_enc_sig_learned)	2m 50s
	1h 39m 22s

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