Update year in copyright notice to shut up lint job

resources/qml/Avatar.qml

resources/qml/ChatPage.qml

resources/qml/CommunitiesList.qml

resources/qml/Completer.qml

resources/qml/ElidedLabel.qml

resources/qml/EncryptionIndicator.qml

resources/qml/ForwardCompleter.qml

resources/qml/ImageButton.qml

resources/qml/MatrixText.qml

resources/qml/MatrixTextField.qml

resources/qml/MessageInput.qml

resources/qml/MessageView.qml

resources/qml/NhekoBusyIndicator.qml

resources/qml/NotificationWarning.qml

resources/qml/PrivacyScreen.qml

resources/qml/QuickSwitcher.qml

resources/qml/Reactions.qml

resources/qml/ReplyPopup.qml

resources/qml/RoomList.qml

resources/qml/Root.qml