Update README.md

README.md

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----
-license: apache-2.0
-task_categories:
-- question-answering
-language:
-- zh
-pretty_name: CoTQA
-size_categories:
-- 1M<n<10M
----
+---
+license: apache-2.0
+task_categories:
+- question-answering
+language:
+- zh
+pretty_name: CoTQA
+size_categories:
+- 1M<n<10M
+---
 Image download link:
+
 Chat_VQA：https://huggingface.co/datasets/ahmed-masry/ChartQA/tree/main
+
 Text_VQA: https://textvqa.org/dataset/
+
 GQA: https://cs.stanford.edu/people/dorarad/gqa/download.html
+
 OK_VQA: https://okvqa.allenai.org/
+
 COCO: https://cocodataset.org/