Bump golang to 1.20 in test-runner

tekton/images/test-runner/Dockerfile

@@ -12,9 +12,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-ARG GO_VERSION=1.19
+ARG GO_VERSION=1.20
 # Build kubetest independently of the rest
-FROM golang:${GO_VERSION}@sha256:800d58363785632e930999c28faee3cf1f8ff7a86ae3eab54af8f63b365fb915 as kubetest
+FROM golang:${GO_VERSION}@sha256:7e3f47de2f547717ebca35255d2b1f4985962d8ebe85bb70746f586e9dc0ab7b as kubetest
 RUN git clone https://github.com/kubernetes/test-infra /go/src/k8s.io/test-infra
 # Using e685556b32c5fb7ab12c3277d41112d47ceac0cd because after that, the URL kubetest
 # uses needs extract credentials.
@@ -23,7 +23,7 @@ RUN cd /go/src/k8s.io/test-infra && \
     git checkout e685556b32c5fb7ab12c3277d41112d47ceac0cd && \
     go install k8s.io/test-infra/kubetest
 
-FROM docker.io/library/debian:bullseye@sha256:43ef0c6c3585d5b406caa7a0f232ff5a19c1402aeb415f68bcd1cf9d10180af8
+FROM docker.io/library/debian:bullseye@sha256:7ac88cb3b95d347e89126a46696374fab97153b63d25995a5c6e75b5e98a0c79
 ARG GO_VERSION
 LABEL maintainer "Tekton Authors <tekton-dev@googlegroups.com>"