chore: release version v4.2.7 #1762

Job	Run time
mix deps.get	18s
mix hex.audit	16s
MIX_ENV=test mix.compile	38s
mix dialyzer	51s
mix credo --strict	42s
mix git_ops.check_message	32s
mix doctor --full --raise	42s
mix format --check-formatted	40s
mix ash_postgres.generate_migrations --check	41s
mix spark.cheat_sheets --check	38s
mix sobelow --config	31s
mix spark.formatter --check	41s
mix test	2m 35s
mix deps.unlock --check-unused	33s
MIX_ENV=dev mix.compile	29s
mix docs	42s
Deploy docs to GitHub pages.	9s
	11m 38s

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