修复正文内容TalkBack不对的bug

app/src/main/java/io/legado/app/ui/book/read/page/ContentTextView.kt

@@ -191,11 +191,13 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
             textPage = pageFactory.curData.textPage
             pageOffset -= textPage.height.toInt()
             upView?.invoke(textPage)
+            contentDescription = textPage.text
         } else if (pageOffset < -textPage.height) {
             pageOffset += textPage.height.toInt()
             pageFactory.moveToNext(false)
             textPage = pageFactory.curData.textPage
             upView?.invoke(textPage)
+            contentDescription = textPage.text
         }
         invalidate()
     }