using new QRegularExpression instead of QregExp old obsoletized in Qt6

src/pappsomspp/amino_acid/aamodification.cpp

src/pappsomspp/obo/obopsimod.h

src/pappsomspp/obo/obopsimodterm.cpp

src/pappsomspp/obo/obopsimodterm.h

src/pappsomspp/widget/obo/obotermform/obotermform.cpp

src/pappsomspp/widget/obo/obotermform/obotermform.h