Presumably this is caused by the bump to GCC 11 in Fedora 34. See
the error that did occur below...
./MultiMC5/application/KonamiCode.cpp: In member function ‘void KonamiCode::input(QEvent*)’:
./MultiMC5/application/KonamiCode.cpp:38:23: error: comparison of integer expressions of different signedness: ‘int’ and ‘std::array<Qt::Key, 10>::size_type’ {aka ‘long unsigned int’} [-Werror=sign-compare]
38 | if(m_progress == konamiCode.size())
| ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
