Bump golang in /trillian/examples/deployment/docker/ctfe (#1244)

Bumps golang from `85aacbe` to `dadce81`.

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

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

trillian/examples/deployment/docker/ctfe/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.21.4-bookworm@sha256:85aacbed94a248f792beb89198649ddbc730649054b397f8d689e9c4c4cceab7 as build
+FROM golang:1.21.4-bookworm@sha256:dadce81d7b2517bef188b89d3df3288780f87f24903c2607fb39c93a21d5365c as build
 
 ARG GOFLAGS=""
 ENV GOFLAGS=$GOFLAGS