Only git operations should update last changed of a repository (#34388) (#34427)

Backport #34388 by @lunny

Try to fix #32046

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

models/actions/run.go

@@ -171,6 +171,7 @@ func (run *ActionRun) IsSchedule() bool {
 
 func updateRepoRunsNumbers(ctx context.Context, repo *repo_model.Repository) error {
 	_, err := db.GetEngine(ctx).ID(repo.ID).
+		NoAutoTime().
 		SetExpr("num_action_runs",
 			builder.Select("count(*)").From("action_run").
 				Where(builder.Eq{"repo_id": repo.ID}),