Bump golang from d8c365d to 69bfed3 in /internal/witness/cmd/feed…

…er (#1337)

Bumps golang from `d8c365d` to `69bfed3`.

---
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:d8c365d63879c2312e332cb796961f2695dd65124ceb3c0247d9c5426b7dde5f as builder
+FROM golang:1.21.6-bookworm@sha256:69bfed39a11563b13cddf6167195e5637a14212f95fd5a4954b377c0511d2fda as builder
 
 ARG GOFLAGS=""
 ENV GOFLAGS=$GOFLAGS