Bump debian from 70da746 to bc2704b (#111)

Bumps debian from `70da746` to `bc2704b`.

---
updated-dependencies:
- dependency-name: debian
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Dockerfile

@@ -14,7 +14,7 @@ WORKDIR /src/hlint-scan
 RUN stack install hlint hlint-scan:exe:hlint-scan && \
     cp "$(stack path --local-bin)/hlint" "$(stack path --local-bin)/hlint-scan" /
 
-FROM debian:buster-slim@sha256:70da746c9ef7c0fe4149ba1435c151f3239bab7a96b56b296e608794003cbf76
+FROM debian:buster-slim@sha256:bc2704bca194bb10ea0b52b4313dc44fc3339cc648457fb18cb3509e71f199b7
 RUN apt-get --yes update && \
     apt-get --yes --no-install-recommends install ca-certificates=20200601~deb10u2 && \
     apt-get --yes clean && \