chore(deps): Bump ash from 2.15.11 to 2.15.15 #1015

Job	Run time
mix deps.get	29s
mix hex.audit	32s
MIX_ENV=test mix.compile	3m 32s
mix credo --strict	59s
mix format --check-formatted	51s
mix git_ops.check_message	36s
mix dialyzer	9m 9s
mix doctor --full --raise	49s
mix sobelow --config	42s
mix spark.cheat_sheets --check	43s
mix test	1m 18s
mix spark.formatter --check	48s
mix deps.unlock --check-unused	35s
mix ash_postgres.generate_migrations --check	45s
MIX_ENV=dev mix.compile	0s
mix docs	0s
mix git-ops.release	0s
Deploy docs to GitHub pages.	0s
	21m 48s

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