Bump the docker-deps group across 4 directories with 2 updates (#3720)

Bumps the docker-deps group with 1 update in the /examples/deployment/docker/db_server/postgresql directory: postgres.
Bumps the docker-deps group with 1 update in the /examples/deployment/docker/log_server directory: golang.
Bumps the docker-deps group with 1 update in the /examples/deployment/docker/log_signer directory: golang.
Bumps the docker-deps group with 1 update in the /integration/cloudbuild/testbase directory: golang.


Updates `postgres` from `888402a` to `87ec5e0`

Updates `golang` from 1.23.4-bookworm to 1.23.5-bookworm

Updates `golang` from 1.23.4-bookworm to 1.23.5-bookworm

Updates `golang` from 1.23.4-bookworm to 1.23.5-bookworm

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

Author: dependabot[bot]

examples/deployment/docker/db_server/postgresql/Dockerfile

@@ -1,4 +1,4 @@
-FROM postgres:17.2@sha256:888402a8cd6075c5dc83a31f58287f13306c318eaad016661ed12e076f3e6341
+FROM postgres:17.2@sha256:87ec5e0a167dc7d4831729f9e1d2ee7b8597dcc49ccd9e43cc5f89e808d2adae
 
 # expects the build context to be: $GOPATH/src/github.com/google/trillian
 COPY storage/postgresql/schema/storage.sql /docker-entrypoint-initdb.d/storage.sql

examples/deployment/docker/log_server/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.23.4-bookworm@sha256:2e838582004fab0931693a3a84743ceccfbfeeafa8187e87291a1afea457ff7a as build
+FROM golang:1.23.5-bookworm@sha256:3149bc5043fa58cf127fd8db1fdd4e533b6aed5a40d663d4f4ae43d20386665f as build
 
 WORKDIR /trillian
 

examples/deployment/docker/log_signer/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.23.4-bookworm@sha256:2e838582004fab0931693a3a84743ceccfbfeeafa8187e87291a1afea457ff7a as build
+FROM golang:1.23.5-bookworm@sha256:3149bc5043fa58cf127fd8db1fdd4e533b6aed5a40d663d4f4ae43d20386665f as build
 
 WORKDIR /trillian
 

integration/cloudbuild/testbase/Dockerfile

@@ -1,5 +1,5 @@
 # This Dockerfile builds a base image for Trillan integration tests.
-FROM golang:1.23.4-bookworm@sha256:2e838582004fab0931693a3a84743ceccfbfeeafa8187e87291a1afea457ff7a
+FROM golang:1.23.5-bookworm@sha256:3149bc5043fa58cf127fd8db1fdd4e533b6aed5a40d663d4f4ae43d20386665f
 
 WORKDIR /testbase