Bump golang from e06b3a4 to 114b9cc in /integration

Bumps golang from `e06b3a4` to `114b9cc`.

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

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

Author: dependabot[bot]

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:1.21.1-bookworm@sha256:e06b3a4a2ad2d274dfbd5377330b018b07fbe96179fd5de4cf2a2248f96311a3 as ct_testbase
+FROM golang:1.21.1-bookworm@sha256:114b9cc39f435cfc34e2d48d0cb12cba2015a87f359f5dbf3ee3b6cf3591b7fb as ct_testbase
 
 WORKDIR /testbase