REPORT-60402 【主题获取】获取的酷炫蓝组件主题，名称乱码

【问题原因】
客户机环境问题，导致读取主题XML文件时使用的默认编码有误

【改动思路】

designer-form/src/main/java/com/fr/design/mainframe/share/util/DownloadUtils.java

@@ -147,7 +147,7 @@ public class DownloadUtils {
             if (fileRes.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                 HttpEntity entity = fileRes.getEntity();
 
-                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent()));
+                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent(), StandardCharsets.UTF_8));
                 StringBuilder stringBuilder = new StringBuilder();
                 String line;
                 while ((line = bufferedReader.readLine()) != null) {