[deps] AC: Update bufferutil to v4.0.9 (#12700) #35410

Job	Run time
Check PR run / Check	3s
Setup	8s
Build artifacts (selfhosted-open-source, dist:oss:selfhost)	5m 28s
Build artifacts (cloud-COMMERCIAL, dist:bit:cloud)	5m 38s
Build artifacts (selfhosted-COMMERCIAL, dist:bit:selfhost)	5m 30s
Build artifacts (cloud-QA, build:bit:qa, true)	5m 40s
Build artifacts (ee, build:bit:ee, true)	5m 50s
Build artifacts (cloud-euprd, build:bit:euprd)	5m 36s
Build artifacts (cloud-euqa, build:bit:euqa, true)	5m 31s
Build artifacts (cloud-usdev, build:bit:usdev, true)	6m 6s
Crowdin Push	44s
Build Docker images (cloud-QA, web-qa-cloud)	1m 38s
Trigger web vault deploy	13s
Build Docker images (ee, web-ee)	1m 29s
Build Docker images (selfhosted-COMMERCIAL, web)	1m 41s
Check for failures	30s
	51m 45s

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