chore: add more label for triage agent (#1531)

Author: chagong

.github/llms.md

@@ -32,7 +32,8 @@ When labeling an issue, follow the rules below per label category:
 - Do not assign multiple labels within the same category, unless explicitly allowed as an exception.
 
 ### Issue Type Labels 
-- [bug]: Primary label for real bug issues 
-- [enhancement]: Primary label for enhancement issues 
-- [documentation]: Primary label for documentation issues 
-- [question]: Primary label for question issues 
+- `bug`: Primary label for real bug issues
+- `enhancement`: Primary label for enhancement issues
+- `documentation`: Primary label for documentation issues
+- `question`: Primary label for question issues
+- `needs more info`: Apply when the issue lacks sufficient information for proper triage or resolution. Use this label when the issue description is too vague or ambiguous to understand the problem