fix 3.12 utcnow depreciation

openant/fs/manager.py

@@ -332,7 +332,7 @@ def download_directory(self, callback=None):
         data = self.download(0, callback)
         return Directory.parse(data)
 
-    def set_time(self, time=datetime.datetime.utcnow()):
+    def set_time(self, time=datetime.datetime.now(datetime.timezone.utc)):
         """
         :param time: datetime in UTC, or None to set to current time
         """