Update CHANGELOG for version 2.9.0
Update CHANGELOG for version 2.9.0

creationst/XCDYouTubeKit,0xced/XCDYouTubeKit,creationst/XCDYouTubeKit,0xced/XCDYouTubeKit,0xced/XCDYouTubeKit,0xced/XCDYouTubeKit,creationst/XCDYouTubeKit,creationst/XCDYouTubeKit