fix: update contributing links

Merge #1528

COPYBARA_INTEGRATE_REVIEW=#1528 from google:doc ec8325e
PiperOrigin-RevId: 775383121

Author: wuliang229

.gitignore

@@ -82,6 +82,7 @@ log/
 .env.development.local
 .env.test.local
 .env.production.local
+uv.lock
 
 # Google Cloud specific
 .gcloudignore

CONTRIBUTING.md

@@ -200,7 +200,7 @@ For any changes that impact user-facing documentation (guides, API reference, tu
 
 ## Contributing Resources
 
-[Contributing folder](https://github.com/google/adk-python/tree/main/contributing/samples) has resources that is helpful for contributors.
+[Contributing folder](https://github.com/google/adk-python/tree/main/contributing) has resources that is helpful for contributors.
 
 
 ## Code reviews

README.md

@@ -135,7 +135,7 @@ adk eval \
 ## 🤝 Contributing
 
 We welcome contributions from the community! Whether it's bug reports, feature requests, documentation improvements, or code contributions, please see our
-- [General contribution guideline and flow](https://google.github.io/adk-docs/contributing-guide/#questions).
+- [General contribution guideline and flow](https://google.github.io/adk-docs/contributing-guide/).
 - Then if you want to contribute code, please read [Code Contributing Guidelines](./CONTRIBUTING.md) to get started.
 
 ## 📄 License