Update README.md

README.md

@@ -33,8 +33,8 @@ The model retrieves top-K candidate tiles from the global index. A retrieved til
 
 Given the extreme sparsity of positives, we report:
 
-- **AUPRC** (Area Under Precision–Recall Curve)
-- **Optimal F1@K\*** (best F1 over retrieval depth K)
+- AUPRC (Area Under Precision–Recall Curve)
+- Optimal F1@K\* (best F1 over retrieval depth K)
 
 These metrics quantify planetary-scale distribution estimation rather than simple top-K accuracy.