hasheddan: Bump cos-gpu-installer image to v20200921

JobBuild
96718
11-19 16:30
a054c759
11-19 16:29
pull-kubernetes-bazel-build 1329461709789728768
pull-kubernetes-bazel-test 1329461709819088896
pull-kubernetes-conformance-kind-ga-only-parallel 1329461710007832576
pull-kubernetes-conformance-kind-ipv6-parallel 1329461709852643328
pull-kubernetes-dependencies 1329461709873614848
pull-kubernetes-e2e-gce-100-performance 1329461710616006656
pull-kubernetes-e2e-gce-device-plugin-gpu 1329464458841427968
pull-kubernetes-e2e-gce-ubuntu-containerd 1329461709898780672
pull-kubernetes-e2e-kind 1329461709953306624
pull-kubernetes-e2e-kind-ipv6 1329461709982666752
pull-kubernetes-integration 1329461709923946496
pull-kubernetes-node-e2e 1329461710045581312
pull-kubernetes-typecheck 1329461711446478848
pull-kubernetes-verify 1329461712293728256