update changelog

Author: halcyra

fastlane/metadata/android/en-US/changelogs/16.txt

@@ -1 +1,7 @@
-better thumbnail showing, better download experience, bugs fixed
+- Fixed fullscreen dimming
+- Fixed long filename error
+- Fixed crash on output removal
+- Improved caching
+- Added thumbnail viewer
+- Added extension toggle
+- Added Shorts blocker