Bump cloudbuild image to go1.23

To match the switch to go 1.23 in #1048

Author: Pluies

cloudbuild.yaml

@@ -21,7 +21,7 @@ steps:
         echo "Checking out ${_PULL_BASE_REF}"
         git checkout ${_PULL_BASE_REF}
 
-  - name: 'gcr.io/k8s-staging-releng/releng-ci:latest-go1.22-bookworm'
+  - name: 'gcr.io/k8s-staging-releng/releng-ci:latest-go1.23-bookworm'
     dir: "go/src/sigs.k8s.io/zeitgeist"
     entrypoint: make
     env: