chore(deps): update pyyaml requirement from >=6.0 to >=6.0.3 in /tools (#86)

Updates the requirements on [pyyaml](https://github.com/yaml/pyyaml) to permit the latest version.
- [Release notes](https://github.com/yaml/pyyaml/releases)
- [Changelog](https://github.com/yaml/pyyaml/blob/6.0.3/CHANGES)
- [Commits](yaml/pyyaml@6.0...6.0.3)

---
updated-dependencies:
- dependency-name: pyyaml
  dependency-version: 6.0.3
  dependency-type: direct:production
...

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Author: dependabot[bot]

tools/requirements.txt

@@ -1,7 +1,7 @@
 # UModel 开发依赖
 # 运行 schema 展开、代码生成、验证器所需
 
-PyYAML>=6.0
+PyYAML>=6.0.3
 
 # 可选：测试
 # pytest>=7.0