fix 修复 代码生成 setIsRequired 标志写反

ruoyi-modules/ruoyi-generator/src/main/java/org/dromara/generator/service/GenTableServiceImpl.java

@@ -302,7 +302,7 @@ public class GenTableServiceImpl implements IGenTableService {
             tableColumn.setColumnComment(column.getComment());
             tableColumn.setColumnType(column.getOriginType().toLowerCase());
             tableColumn.setSort(column.getPosition());
-            tableColumn.setIsRequired(column.isNullable() ? "1" : "0");
+            tableColumn.setIsRequired(column.isNullable() ? "0" : "1");
             tableColumn.setIsIncrement(column.isAutoIncrement() ? "1" : "0");
             tableColumns.add(tableColumn);
         });