RAGflow/.github/pull_request_template.md

What problem does this PR solve?

Briefly describe what this PR aims to solve. Include background context that will help reviewers understand the purpose of the PR.

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):