chore(deps): update dependency sigstore/cosign to v2.4.3

Dockerfile.debian

@@ -15,7 +15,7 @@ RUN apt-get update && apt-get install -y \
   && rm -rf /var/lib/apt/lists/*
 
 # NOTE: cosign is not yet available in the debian apt sources
-ARG COSIGN_VERSION=2.4.2
+ARG COSIGN_VERSION=2.4.3
 WORKDIR /tmp
 RUN wget https://github.com/sigstore/cosign/releases/download/v${COSIGN_VERSION}/cosign_${COSIGN_VERSION}_${TARGETARCH}.deb && \
     dpkg -i *.deb && \