Add polkadot-bulletin-chain binary to release workflow #8

Job	Run time
build-runtimes (bulletin-polkadot, bulletin-polkadot-runtime, runtimes/bulletin-polkadot)	14m 34s
build-runtimes (bulletin-westend, bulletin-westend-runtime, runtimes/bulletin-westend)	24m 5s
build-node	3s
publish-release	0s
	38m 42s

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