Bump distroless/base-debian12 in /examples/deployment/docker/log_sign…

…er (#3474)

Bumps distroless/base-debian12 from `d8d01e2` to `786007f`.

---
updated-dependencies:
- dependency-name: distroless/base-debian12
  dependency-type: direct:production
...

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

examples/deployment/docker/log_signer/Dockerfile

@@ -18,7 +18,7 @@ RUN go install ./cmd/trillian_log_signer
 RUN go run github.com/google/go-licenses save ./cmd/trillian_log_signer --save_path /THIRD_PARTY_NOTICES
 
 # Make a minimal image.
-FROM gcr.io/distroless/base-debian12@sha256:d8d01e2d5868f622544543ca0311679bbc2f3fbf7f7bafd11af78a284c479ea3
+FROM gcr.io/distroless/base-debian12@sha256:786007f631d22e8a1a5084c5b177352d9dcac24b1e8c815187750f70b24a9fc6
 
 COPY --from=build /go/bin/trillian_log_signer /
 COPY --from=build /THIRD_PARTY_NOTICES /THIRD_PARTY_NOTICES