chore(deps): bump Swatinem/rust-cache from 2.4.0 to 2.6.0 #2719

Job	Run time
Unit tests	8m 49s
Functional tests (bitcoin_syncer, 23.0, 0.9.9)	20m 48s
Functional tests (monero_syncer, 23.0, 0.9.9)	16m 44s
Functional tests (swap_alice_maker, 23.0, 0.9.9)	13m 39s
Functional tests (swap_bob_funds_incorrect_amount, 23.0, 0.9.9)	13m 3s
Functional tests (swap_bob_maker_kill_peerd, 23.0, 0.9.9)	13m 35s
Functional tests (swap_bob_maker_manual_monero_sweep, 23.0, 0.9.9)	13m 49s
Functional tests (swap_bob_maker_manual_bitcoin_sweep, 23.0, 0.9.9)	15m 9s
Functional tests (swap_bob_maker_normal, 23.0, 0.9.9)	13m 23s
Functional tests (swap_bob_maker_punish_kill_bob, 23.0, 0.9.9)	14m 51s
Functional tests (swap_bob_maker_refund, 23.0, 0.9.9)	22m 49s
Functional tests (swap_bob_maker_restore_checkpoint, 23.0, 0.9.9)	15m 33s
Functional tests (swap_bob_maker_restore_reconnect_alice_pre_lock, 23.0, 0.9.9)	13m 37s
Functional tests (swap_bob_maker_user_abort_sweep_btc, 23.0, 0.9.9)	14m 49s
Functional tests (swap_parallel_execution, 23.0, 0.9.9)	19m 8s
Functional tests (swap_revoke_deal_bob_maker_normal, 23.0, 0.9.9)	16m 10s
Functional tests (cli, 23.0, 0.9.9)	11m 14s
Functional tests (grpc, 23.0, 0.9.9)	13m 16s
Functional tests (bitcoin_syncer, 22.0, 0.8.11)	22m 7s
Functional tests (bitcoin_syncer, 22.0, 0.9.9)	22m 9s
	5h 14m 42s

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