Bump `exception_page` shard to v0.4.0 #882

Job	Run time
check_format	1m 43s
specs (shard.yml, 1.6.2, false)	2m 48s
specs (shard.yml, latest, false)	1m 51s
specs (shard.edge.yml, latest, true)	1m 56s
specs (shard.yml, nightly, true)	2m 0s
	10m 18s

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