fix: 修复环比数据异常的问题

src/main/java/mjkf/xinke/main/controller/PublicController.java

@@ -80,7 +80,7 @@ public class PublicController {
         queryYoy.isNotNull(PricePublish::getMaterialId);  // 材料编号禁止为空
         var yoyData = pricePublishService.list(queryYoy);
 
-        var momDate = LocalDate.of(year, month, 1).plusMonths(1);
+        var momDate = LocalDate.of(year, month, 1).minusMonths(1);
         var queryMom = pricePublishService.getQuery(momDate.getYear(), momDate.getMonthValue(), null, name, spec, PricePublishType.CURRENT);
         queryMom.isNotNull(PricePublish::getMaterialId);
         var momData = pricePublishService.list(queryMom);