Bump golang in /integration/cloudbuild/testbase in the docker-deps gr…

…oup (#3654)

Bumps the docker-deps group in /integration/cloudbuild/testbase with 1 update: golang.


Updates `golang` from `18d2f94` to `2341ddf`

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

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

integration/cloudbuild/testbase/Dockerfile

@@ -1,5 +1,5 @@
 # This Dockerfile builds a base image for Trillan integration tests.
-FROM golang:1.23.2-bookworm@sha256:18d2f940cc20497f85466fdbe6c3d7a52ed2db1d5a1a49a4508ffeee2dff1463
+FROM golang:1.23.2-bookworm@sha256:2341ddffd3eddb72e0aebab476222fbc24d4a507c4d490a51892ec861bdb71fc
 
 WORKDIR /testbase