dims: Bump timeout for pull-kubernetes-node-kubelet-serial-containerd

JobBuild
23090
07-31 23:35
pull-test-infra-bazel 1421615445336657920
pull-test-infra-gubernator 1421615445403766784
pull-test-infra-integration 1421615445554761728
pull-test-infra-prow-checkconfig 1421615445508624384
pull-test-infra-verify-file-perms 1421615445441515520
pull-test-infra-yamllint 1421615445475069952