bazel: Release v0.3.15 #454

Job	Run time
request	13s
release (actions-with-version, release) / release	9s
release (python-args, prepare) / prepare	15s
release (actions-with-version, prepare) / prepare	9s
release (bins, prepare) / prepare	11s
release (python, release) / release	16s
release (bins, release) / release	10s
release (bazel, release) / release	20s
release (python, prepare) / prepare	12s
release (bazel, prepare) / prepare	25s
release (actions, prepare) / prepare	13s
release (actions, release) / release	12s
release (python-args, release) / release	10s
Publishing	4s
	2m 59s

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