message: Perform package upgrades to avoid TLS certificate failures.
diff: @@ -27,6 +27,10 @@ GO_MOD_DIR="${TMP_DIR}/go-mod-test"
  REPO_URL_PREFIX="github.com/google/tink"
  +# TODO(b/201806781): Remove when no longer necessary.
  +sudo apt-get update
  +sudo apt-get upgrade -y ca-certificates
  +
  (
  cd "${REPO_DIR}"
  ./kokoro/copy_credentials.sh
  