docs: update PR template to English version

.github/pull_request_template.md

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+<!--
+Pull Request Template for RustFS
+-->
+
+## Type of Change
+- [ ] New Feature
+- [ ] Bug Fix
+- [ ] Documentation
+- [ ] Performance Improvement
+- [ ] Test/CI
+- [ ] Refactor
+- [ ] Other:
+
+## Related Issues
+<!-- List related Issue numbers, e.g. #123 -->
+
+## Summary of Changes
+<!-- Briefly describe the main changes and motivation for this PR -->
+
+## Checklist
+- [ ] I have read and followed the [CONTRIBUTING.md](CONTRIBUTING.md) guidelines
+- [ ] Code is formatted with `cargo fmt --all`
+- [ ] Passed `cargo clippy --all-targets --all-features -- -D warnings`
+- [ ] Passed `cargo check --all-targets`
+- [ ] Added/updated necessary tests
+- [ ] Documentation updated (if needed)
+- [ ] CI/CD passed (if applicable)
+
+## Impact
+- [ ] Breaking change (compatibility)
+- [ ] Requires doc/config/deployment update
+- [ ] Other impact:
+
+## Additional Notes
+<!-- Any extra information for reviewers -->
+
+---
+
+Thank you for your contribution! Please ensure your PR follows the community standards ([CODE_OF_CONDUCT.md](CODE_OF_CONDUCT.md)) and sign the CLA if this is your first contribution.