Bump golang from 69bfed3 to 3efef61 in /internal/witness/cmd/feed…

…er (#1342)

Bumps golang from `69bfed3` to `3efef61`.

---
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/feeder/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.21.6-bookworm@sha256:69bfed39a11563b13cddf6167195e5637a14212f95fd5a4954b377c0511d2fda as builder
+FROM golang:1.21.6-bookworm@sha256:3efef61ff1d99c8a90845100e2a7e934b4a5d11b639075dc605ff53c141044fc as builder
 
 ARG GOFLAGS=""
 ENV GOFLAGS=$GOFLAGS