docs: update Python version badge #10669

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PR 类型 PR types

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PR 变化内容类型 PR changes

Docs

描述 Description

Python 3.11 下无法安装 PaddleOCR，应当更改 Python Badge 3.7+ 为 3.7~3.10 避免误导，至少在最新的 2.7.1 Release 下，此问题未被解决 Relative to #10669

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• 这个 PR 是提交到dygraph分支或者是一个cherry-pick，否则请先提交到dygarph分支。
  This PR is pushed to the dygraph branch or cherry-picked from the dygraph branch. Otherwise, please push your changes to the dygraph branch.
• 这个PR清楚描述了功能，帮助评审能提升效率。This PR have fully described what it does such that reviewers can speedup.
• 这个PR已经经过本地测试。This PR can be convered by current tests or already test locally by you.

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