fix save subtitle on win

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/pages/video/widgets/header_control.dart

@@ -1136,8 +1136,15 @@ class HeaderControlState extends State<HeaderControl> {
                                 res.headers.map,
                               ),
                             );
-                            final name =
+                            String name =
                                 '${introController.videoDetail.value.title}-${videoDetailCtr.bvid}-${videoDetailCtr.cid.value}-${item.lanDoc}.json';
+                            if (Platform.isWindows) {
+                              // Reserved characters may not be used in file names. See: https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file#naming-conventions
+                              name = name.replaceAll(
+                                RegExp(r'[<>:/\\|?*"]'),
+                                '',
+                              );
+                            }
                             Utils.saveBytes2File(
                               name: name,
                               bytes: bytes,