Minor updates to async sequences #207

Job	Run time
Check for Changes	3s
Linux Matrix (swift:5.10.1, amazonlinux2)	2m 55s
Linux Matrix (swift:5.10.1, focal)	2m 44s
Linux Matrix (swift:5.10.1, jammy)	2m 48s
Linux Matrix (swift:5.10.1, rhel-ubi9)	2m 47s
Linux Matrix (swift:5.10.1, mantic)	3m 20s
Linux Matrix (swift:5.10.1, noble)	3m 19s
Linux Matrix (swiftlang/swift:nightly-6.0, amazonlinux2)	3m 34s
Linux Matrix (swiftlang/swift:nightly-6.0, focal)	3m 46s
Linux Matrix (swiftlang/swift:nightly-6.0, jammy)	3m 24s
Linux Matrix (swiftlang/swift:nightly-6.0, rhel-ubi9)	3m 23s
Linux Tests	1s
	32m 4s

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