Bump golang from 7f9c058 to d996c64 in /integration (#1398)

Bumps golang from `7f9c058` to `d996c64`.

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.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:1.22.1-bookworm@sha256:7f9c05839800653366fa503d21d48f245f1e60a5eb60043efa14b562fea442b6 as ct_testbase
+FROM golang:1.22.1-bookworm@sha256:d996c645c9934e770e64f05fc2bc103755197b43fd999b3aa5419142e1ee6d78 as ct_testbase
 
 WORKDIR /testbase