Bug Rag Ranker (sometimes the Rank for a document is not only a number)

src/main/java/com/olympus/hermione/utility/RAGDocumentRanker.java

@@ -31,7 +31,7 @@ public class RAGDocumentRanker {
             rankingPrompt +="Answer with a number between 1 and 10 and nothing else.";
         
             OlympusChatClientResponse resp = chatClient.getChatCompletion(rankingPrompt);
-            String rank = resp.getContent();   
+            String rank = resp.getContent().substring(0, 1);  
 
             int rankInt = Integer.parseInt(rank);
             logger.info("Rank: " + rankInt);