Lint

Update multipart boundary error to match Vuforia #7541

Job	Run time
build (3.13, windows-latest, pre-push)	4m 34s
build (3.13, windows-latest, pre-commit)	2m 10s
build (3.13, ubuntu-latest, manual)	54s
build (3.13, ubuntu-latest, pre-commit)	57s
build (3.13, windows-latest, manual)	1m 59s
build (3.13, ubuntu-latest, pre-push)	3m 30s
completion-lint	2s
	14m 6s

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