Merge pull request openshift#7270 from rwsu/update-go-test-to-go-1.20

Update hack/go-test.sh to golang 1.20

Author: openshift-merge-robot

hack/go-test.sh

@@ -8,6 +8,6 @@ else
     --env IS_CONTAINER=TRUE \
     --volume "${PWD}:/go/src/github.com/openshift/installer:z" \
     --workdir /go/src/github.com/openshift/installer \
-    docker.io/golang:1.18 \
+    docker.io/golang:1.20 \
     ./hack/go-test.sh "${@}"
 fi