Update debian:stable-slim Docker digest to 377ddc2

Author: renovate[bot]

build/Dockerfile

@@ -15,7 +15,7 @@ FROM busybox AS busybox
 RUN addgroup -S pulsegroup && adduser -S -G pulsegroup pulseuser
 
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-FROM debian:stable-slim@sha256:50db38a20a279ccf50761943c36f9e82378f92ef512293e1239b26bb77a8b496 AS certs
+FROM debian:stable-slim@sha256:377ddc2a20fe8632a49b69dcfff10fccbd5b4f0b8c2d593420a6a5e03070dfa1 AS certs
 RUN apt-get update && apt-get install -y ca-certificates
 
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