yuzu: Fix fmt 9.0.0 issues

src/yuzu/bootmanager.cpp

@@ -1089,8 +1089,8 @@ QStringList GRenderWindow::GetUnsupportedGLExtensions() const {
     }
 
     if (!unsupported_ext.empty()) {
-        LOG_ERROR(Frontend, "GPU does not support all required extensions: {}",
-                  glGetString(GL_RENDERER));
+        const std::string gl_renderer{reinterpret_cast<const char*>(glGetString(GL_RENDERER))};
+        LOG_ERROR(Frontend, "GPU does not support all required extensions: {}", gl_renderer);
     }
     for (const QString& ext : unsupported_ext) {
         LOG_ERROR(Frontend, "Unsupported GL extension: {}", ext.toStdString());

src/yuzu/main.cpp

@@ -3338,7 +3338,8 @@ void GMainWindow::MigrateConfigFiles() {
         }
         const auto origin = config_dir_fs_path / filename;
         const auto destination = config_dir_fs_path / "custom" / filename;
-        LOG_INFO(Frontend, "Migrating config file from {} to {}", origin, destination);
+        LOG_INFO(Frontend, "Migrating config file from {} to {}", origin.string(),
+                 destination.string());
         if (!Common::FS::RenameFile(origin, destination)) {
             // Delete the old config file if one already exists in the new location.
             Common::FS::RemoveFile(origin);