Bump golang from 3451eec to b03f3ba in /integration

Bumps golang from `3451eec` to `b03f3ba`.

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

Signed-off-by: dependabot[bot] <support@github.com>

integration/Dockerfile

@@ -1,6 +1,6 @@
 # This Dockerfile builds a base image for the certificate-transparency-go CloudBuild integration testing.
 # See https://hub.docker.com/_/golang for the set of golang base images.
-FROM golang:1.22.2-bookworm@sha256:3451eec734d0d3d87ea6f240d6854dd71573801157b29fbd2adc359fd0fc714c as ct_testbase
+FROM golang:1.22.2-bookworm@sha256:b03f3ba515751657c75475b20941fef47341fccb3341c3c0b64283ff15d3fb46 as ct_testbase
 
 WORKDIR /testbase