message: Fix broken Python 3.9 RBE config
diff: @@ -37,7 +37,8 @@ tag_filters="-no_oss,-oss_serial,-gpu,-tpu,-benchmark-test""$(maybe_skip_v1)"
  "${BAZEL_WRAPPER_PATH}" \
  test \
  --config=rbe_cpu_linux \
  - --config=rbe_linux_py39 \
  + --config=rbe_linux_py3 \
  + --python_path="/usr/bin/python3.9" \
  --config=tensorflow_testing_rbe_linux \
  --test_tag_filters="${tag_filters}" \
  --build_tag_filters="${tag_filters}" \
  