Fix regression: access log template, gitea manager cli command (#24838)

Close #24836

![image](https://github.com/go-gitea/gitea/assets/2114189/95b025d2-f25f-4246-a08a-fe44ecb787a9)

![image](https://github.com/go-gitea/gitea/assets/2114189/c3afe1fa-2a23-420d-a016-3b67dcd04cd5)

modules/graceful/restart_unix.go

@@ -109,5 +109,7 @@ func RestartProcess() (int, error) {
 	if err != nil {
 		return 0, err
 	}
-	return process.Pid, nil
+	processPid := process.Pid
+	_ = process.Release() // no wait, so release
+	return processPid, nil
 }