Issue in preparing RESULTS.md for ASR recipes

[YoshikiMas]

Describe the bug
When pats of valid_set are included in test_set, the generated RESULTS.md does not include the scores on valid_set.

Basic environments:

• espnet version: espnet 202304
• Git hash ed6ee209c93fe72b95a687272a5faf69639b7b49
  • Commit date Tue Jul 4 17:12:39 2023 +0900

Task information:

• Task: ASR
• Recipe: e.g., an4
• ESPnet2

Comments
It could be because the scores for valid_set is moved from ${asr_exp}/${inference_tag}/${dset} to ${asr_exp}/${inference_tag}/org/${dset} after this PR. As a result, show_asr_result.sh cannot track the scores for valid_set.
I am now addressing this problem like by adding symbolic links to the scores.