Update README.md

README.md

-# grounding_dino_mmcv
+# grounding_dino
 ## 论文
 `Grounding DINO: Marrying DINO with Grounded Pre-Training for Open-Set Object Detection`<br>
 [论文链接](https://arxiv.org/abs/2303.05499)<br>
@@ -109,7 +109,7 @@ bash ./train.sh
 - 官方推理需要下载nltk的nltk_data中的 tokenizers/punkt和taggers/averaged_perceptron_tagger
 - 可在http://www.nltk.org/nltk_data/ 下载并放于/root/nltk_data下
 - nltk数据如下所示
-`
+```
 ├── nltk_data 
 │   ├── taggers
 │       ├── averaged_perceptron_tagger
@@ -120,7 +120,7 @@ bash ./train.sh
 │          ├──anish.pickle
 │          ├──dutch.pickle
 │          ├── ......
-`
+```
 ```bash
 # 官方推理代码
 python demo/image_demo.py \