fix enabling repo packages when projects are off (#20486)

routers/web/repo/setting.go

@@ -476,7 +476,7 @@ func SettingsPost(ctx *context.Context) {
 			deleteUnitTypes = append(deleteUnitTypes, unit_model.TypeProjects)
 		}
 
-		if form.EnablePackages && !unit_model.TypeProjects.UnitGlobalDisabled() {
+		if form.EnablePackages && !unit_model.TypePackages.UnitGlobalDisabled() {
 			units = append(units, repo_model.RepoUnit{
 				RepoID: repo.ID,
 				Type:   unit_model.TypePackages,