Bump the docker-deps group across 4 directories with 2 updates (#3850)

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 `5773fe7` to `3bb77a0`

Updates `golang` from `2f768d4` to `fdd8e83`

Updates `golang` from `2f768d4` to `fdd8e83`

Updates `golang` from `2f768d4` to `fdd8e83`

---
updated-dependencies:
- dependency-name: postgres
  dependency-version: '18.1'
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: docker-deps
- dependency-name: golang
  dependency-version: 1.25.6-bookworm
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: docker-deps
- dependency-name: golang
  dependency-version: 1.25.6-bookworm
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: docker-deps
- dependency-name: golang
  dependency-version: 1.25.6-bookworm
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: docker-deps
...

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Author: dependabot[bot]

examples/deployment/docker/db_server/postgresql/Dockerfile

@@ -1,4 +1,4 @@
-FROM postgres:18.1@sha256:5773fe724c49c42a7a9ca70202e11e1dff21fb7235b335a73f39297d200b73a2
+FROM postgres:18.1@sha256:3bb77a07b9ce8b8de0fe6d9b063adf20b9cca1068a1bcdc054cac71a69ce0ca6
 
 # 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:1.25.6-bookworm@sha256:2f768d462dbffbb0f0b3a5171009f162945b086f326e0b2a8fd5d29c3219ff14 as build
+FROM golang:1.25.6-bookworm@sha256:fdd8e8344873d406d3aa2edf975e5f8f36a85201dd0d745bd76c446fe39ffcfd as build
 
 WORKDIR /trillian
 

examples/deployment/docker/log_signer/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.25.6-bookworm@sha256:2f768d462dbffbb0f0b3a5171009f162945b086f326e0b2a8fd5d29c3219ff14 as build
+FROM golang:1.25.6-bookworm@sha256:fdd8e8344873d406d3aa2edf975e5f8f36a85201dd0d745bd76c446fe39ffcfd as build
 
 WORKDIR /trillian
 

integration/cloudbuild/testbase/Dockerfile

@@ -1,5 +1,5 @@
 # This Dockerfile builds a base image for Trillan integration tests.
-FROM golang:1.25.6-bookworm@sha256:2f768d462dbffbb0f0b3a5171009f162945b086f326e0b2a8fd5d29c3219ff14
+FROM golang:1.25.6-bookworm@sha256:fdd8e8344873d406d3aa2edf975e5f8f36a85201dd0d745bd76c446fe39ffcfd
 
 WORKDIR /testbase