fix webdav init block main thread

app/src/main/java/io/legado/app/model/ReadBook.kt

@@ -107,9 +107,11 @@ object ReadBook : CoroutineScope by MainScope() {
 
     fun uploadProgress() {
         book?.let {
+            Coroutine.async {
                 AppWebDav.uploadBookProgress(it)
             }
         }
+    }
 
     fun upReadTime() {
         Coroutine.async {