Bump golang from d3114db to a0b3bc4 in /internal/witness/cmd/witn…

…ess (#1157)

Bumps golang from `d3114db` to `a0b3bc4`.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

internal/witness/cmd/witness/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.21.1-bookworm@sha256:d3114db136e7f2d9b08c3fcd374381ba3f8d85c17b80c48dbc53cd938cfb2b64 AS builder
+FROM golang:1.21.1-bookworm@sha256:a0b3bc435cf2118e62db49d611bcdfa87a525be6fdf49179a5c9dbd4d0f1c63f AS builder
 
 ARG GOFLAGS=""
 ENV GOFLAGS=$GOFLAGS
@@ -18,7 +18,7 @@ COPY . .
 RUN go build -o /build/bin/witness ./internal/witness/cmd/witness
 
 # Build release image
-FROM golang:1.21.1-bookworm@sha256:d3114db136e7f2d9b08c3fcd374381ba3f8d85c17b80c48dbc53cd938cfb2b64
+FROM golang:1.21.1-bookworm@sha256:a0b3bc435cf2118e62db49d611bcdfa87a525be6fdf49179a5c9dbd4d0f1c63f
 
 COPY --from=builder /build/bin/witness /bin/witness
 ENTRYPOINT ["/bin/witness"]