chore(deps): bump @slack/bolt from 3.22.0 to 4.2.0 in /examples/message-metadata #483

Job	Run time
examples (18.x, examples/getting-started-typescript)	35s
samples (18.x, slack-samples/bolt-ts-starter-template)	32s
examples (18.x, examples/custom-receiver)	42s
samples (18.x, slack-samples/bolt-ts-custom-function-template)	39s
examples (20.x, examples/getting-started-typescript)	36s
samples (20.x, slack-samples/bolt-ts-starter-template)	31s
examples (20.x, examples/custom-receiver)	37s
samples (20.x, slack-samples/bolt-ts-custom-function-template)	37s
examples (22.x, examples/getting-started-typescript)	39s
samples (22.x, slack-samples/bolt-ts-starter-template)	34s
examples (22.x, examples/custom-receiver)	35s
samples (22.x, slack-samples/bolt-ts-custom-function-template)	33s
	7m 10s

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