improve prompt (#1131)

.github/workflows/duplicate-issues.yml

@@ -49,15 +49,23 @@ jobs:
           3. Related functionality or components
           4. Similar feature requests
 
+          For each potential duplicate you find, assign a confidence rating (high, medium, or low) indicating how likely it is to be a match.
+
           If you find any potential duplicates, please comment on the new issue with:
           - A brief explanation of why it might be a duplicate
           - Links to the potentially duplicate issues
+          - A confidence assessment (high/medium/low) for each
           - A suggestion to check those issues first
 
           Use this format for the comment:
           'This issue might be a duplicate of existing issues. Please check:
-          - #[issue_number]: [brief description of similarity]
+          - #[issue_number]: [brief description of similarity] (confidence: [high/medium/low])
 
           Feel free to ignore if none of these address your specific case.'
 
+          Examples:
+          - #123: Contains identical error message and affects same component (confidence: high)
+          - #124: Similar feature request but slightly different use case (confidence: medium)
+          - #125: Mentions a related symptom, but context is unclear (confidence: low)
+
           If no clear duplicates are found, do not comment."