misc: Update copyright years to 2023

src/app/avadapter.h

src/app/avatarimageprovider.h

src/app/avatarregistry.cpp

src/app/avatarregistry.h

src/app/bannedlistmodel.cpp

src/app/bannedlistmodel.h

src/app/calladapter.cpp

src/app/calladapter.h

src/app/calloverlaymodel.cpp

src/app/calloverlaymodel.h

src/app/callparticipantsmodel.cpp

src/app/callparticipantsmodel.h

src/app/commoncomponents/Avatar.qml

src/app/commoncomponents/BackButton.qml

src/app/commoncomponents/BaseModalDialog.qml

src/app/commoncomponents/BubbleLabel.qml

src/app/commoncomponents/CallMessageDelegate.qml

src/app/commoncomponents/ChatviewMessageOptions.qml

src/app/commoncomponents/ConfirmDialog.qml

src/app/commoncomponents/ContactMessageDelegate.qml