Rename 'result' to 'text' in foreach loop for clarity

The variable name `result` in the `foreach` loop has been changed to `text` for better clarity and consistency. This change affects the loop that appends chunks to the `prompt` variable.

SqlDatabaseVectorSearch/Services/ChatService.cs

@@ -49,9 +49,9 @@ public class ChatService(IMemoryCache cache, IChatCompletionService chatCompleti
             """);
 
         // TODO: Ensure that chunks are not too long, according to the model max token.
-        foreach (var result in chunks)
+        foreach (var text in chunks)
         {
-            prompt.Append(result);
+            prompt.Append(text);
             prompt.AppendLine("---");
         }