Update app.py

app.py

@@ -339,7 +339,7 @@ class RAGIndex:
         self.chunks = all_chunks
         self.chunk_sources = all_sources
 
-    def retrieve(self, query: str, top_k: int = 5) -> List[Tuple[str, str, float]]:
+    def retrieve(self, query: str, top_k: int = 15) -> List[Tuple[str, str, float]]:
         """Retrieve relevant chunks for a query"""
         if not query or not query.strip():
             return []