修复文件上传根目录配置读取错误

src/main/java/com/xjhs/findmemerchant/file/FileController.java

@@ -30,7 +30,7 @@ import java.util.UUID;
 public class FileController {
 
 
-    @Value("${appconfig.amapKey}")
+    @Value("${appconfig.saveFileRoot}")
     private String fileSaveRoot="./file-data";
 
     private final FileMetaInfoRepository fileMetaInfoRepository;