fix 修复 根据key更新参数配置报null问题

ruoyi-modules/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysConfigServiceImpl.java

@@ -117,12 +117,12 @@ public class SysConfigServiceImpl implements ISysConfigService {
     @CachePut(cacheNames = CacheNames.SYS_CONFIG, key = "#config.configKey")
     @Override
     public String updateConfig(SysConfig config) {
+        int row = 0;
+        if (config.getConfigId() != null) {
             SysConfig temp = baseMapper.selectById(config.getConfigId());
             if (!StringUtils.equals(temp.getConfigKey(), config.getConfigKey())) {
                 CacheUtils.evict(CacheNames.SYS_CONFIG, temp.getConfigKey());
             }
-        int row = 0;
-        if (config.getConfigId() != null) {
             row = baseMapper.updateById(config);
         } else {
             row = baseMapper.update(config, new LambdaQueryWrapper<SysConfig>()