Use currentAudioIndex, this will give us the option to force it to a differnt value

Sometimes the play item isn't updated very quickly, the timeElapsed
can be greater than the duration in those cases. We could probably
force the currentItemIndex to increment in those cases to get
speech cards to update.

apple/OmnivoreKit/Sources/Services/AudioSession/AudioController.swift

@@ -377,7 +377,7 @@
         // Sometimes we get negatives
         currentItemOffset = max(currentItemOffset, 0)
 
-        let idx = item.speechItem.audioIdx
+        let idx = currentAudioIndex // item.speechItem.audioIdx
         let currentItem = document?.utterances[idx].text ?? ""
         let currentReadIndex = currentItem.index(currentItem.startIndex, offsetBy: min(currentItemOffset, currentItem.count))
         let lastItem = String(currentItem[..<currentReadIndex])
@@ -561,6 +561,7 @@
       if let player = player {
         observer = player.observe(\.currentItem, options: [.new]) { _, _ in
           self.currentAudioIndex = (player.currentItem as? SpeechPlayerItem)?.speechItem.audioIdx ?? 0
+          self.updateReadText()
         }
       }