Bump serde-untagged from 0.1.4 to 0.1.5 #3632

Job	Run time
test (ubuntu-latest, ci)	21m 54s
test (ubuntu-latest, other)	8m 59s
test (ubuntu-latest, third_party_0)	15m 44s
test (ubuntu-latest, third_party_1)	32m 12s
test (ubuntu-latest, trycmd)	9m 20s
test (macos-latest, ci)	3m 21s
test (macos-latest, other)	14m 41s
test (macos-latest, third_party_0)	56m 19s
test (macos-latest, third_party_1)	45m 15s
test (macos-latest, trycmd)	14m 50s
test (windows-latest, ci)	9m 45s
test (windows-latest, other)	13m 53s
test (windows-latest, third_party_0)	22m 51s
test (windows-latest, third_party_1)	42m 15s
test (windows-latest, trycmd)	11m 59s
all-checks	1s
	5h 23m 19s

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