fix: panic when building bitcoin state in bootstrap script #1201

Job	Run time
canister-build-reproducibility	3m 13s
cargo-clippy	31s
cargo-build (ubuntu-20.04)	4m 0s
rustfmt	16s
cargo-build (macos-12)	11m 56s
ShellCheck	5s
benchmark	2m 47s
cycles_burn	2m 25s
charge-cycles-on-reject	2m 33s
cargo-tests (ubuntu-20.04)	3m 43s
e2e-disable-api-if-not-fully-synced-flag	2m 58s
cargo-tests (macos-12)	2m 39s
e2e-scenario-1	2m 41s
upgradability	2m 53s
e2e-scenario-2	2m 34s
set_config	2m 11s
e2e-scenario-3	2m 25s
watchdog_get_config	2m 39s
watchdog_health_status	2m 38s
watchdog_metrics	2m 35s
watchdog_upgradability	3m 1s
checks-pass	1s
	1h 0m 44s

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