NAVAND-552: fix changelog

Author: dzinad

changelog/unreleased/bugfixes/dd.md

@@ -0,0 +1,4 @@
+- Introduced `VoiceInstructionsDownloadTrigger` `MapboxSpeechAPI#generatePredownloaded` to use predownloaded voice instructions instead of downloading them on demand. Example usage can be found in the examples directory ( see `MapboxVoiceActivity`). [#6771](https://github.com/mapbox/mapbox-navigation-android/pull/6771)
+- Introduced `VoiceInstructionsPrefetcher` `MapboxSpeechAPI#generatePredownloaded` to use predownloaded voice instructions instead of downloading them on demand. Example usage can be found in the examples directory ( see `MapboxVoiceActivity`). [#6771](https://github.com/mapbox/mapbox-navigation-android/pull/6771)
+- Enabled voice instructions predownloading for those who use `MapboxAudioGuidance`. [#6771](https://github.com/mapbox/mapbox-navigation-android/pull/6771)
+- Fixed an issue where with low connectivity voice instruction might have been played too late for those who use `MapboxAudioGuidance`. If you use `MapboxSpeechAPI` directly, switch to voice instructions predownloading as described above if you encounter said issue. [#6771](https://github.com/mapbox/mapbox-navigation-android/pull/6771)