[ #38117 ] Update copyright

src/abstractbookmarkmodel.cpp

src/abstractbookmarkmodel.h

src/abstractcontactbackend.cpp

src/abstractcontactbackend.h

src/account.cpp

src/account.h

src/accountlistmodel.cpp

src/accountlistmodel.h

src/audiocodecmodel.cpp

src/audiocodecmodel.h

src/audiosettingsmodel.cpp

src/audiosettingsmodel.h

src/call.cpp

src/call.h

src/callmodel.cpp

src/callmodel.h

src/categorizedaccountmodel.cpp

src/categorizedaccountmodel.h

src/categorizedcompositenode.cpp

src/categorizedcompositenode.h