[ehealth] fix README

Author: LemonNoel

examples/biomedical/cblue/README.md

@@ -119,4 +119,5 @@ $ python train_spo.py --batch_size 12 --max_seq_length 300 --learning_rate 6e-5
 ```
 
 [1] CBLUE: A Chinese Biomedical Language Understanding Evaluation Benchmark [pdf](https://arxiv.org/abs/2106.08087) [git](https://github.com/CBLUEbenchmark/CBLUE) [web](https://tianchi.aliyun.com/specials/promotion/2021chinesemedicalnlpleaderboardchallenge)
+
 [2] Wang, Quan, et al. “Building Chinese Biomedical Language Models via Multi-Level Text Discrimination.” arXiv preprint arXiv:2110.07244 (2021). [pdf](https://arxiv.org/abs/2110.07244)