fix: datetime.datetime.utcnow() is deprecated (#2173)

* fix: datetime.datetime.utcnow() is deprecated

Signed-off-by: LAKSHJAIN14 <jainlaksh07@gmail.com>

* fix: datetime.datetime.utcnow() is deprecated

Signed-off-by: LAKSHJAIN14 <jainlaksh07@gmail.com>

---------

Signed-off-by: LAKSHJAIN14 <jainlaksh07@gmail.com>
Co-authored-by: Lou DeGenaro <lou.degenaro@gmail.com>

Author: LAKSHJAIN14

trestle/tasks/csv_to_oscal_mc.py

@@ -63,7 +63,7 @@
 
 logger = logging.getLogger(__name__)
 
-timestamp = datetime.datetime.utcnow().replace(microsecond=0).replace(tzinfo=datetime.timezone.utc).isoformat()
+timestamp = datetime.datetime.now(datetime.timezone.utc).replace(microsecond=0).isoformat()
 
 
 class CsvToOscalMappingCollection(TaskBase):
@@ -123,9 +123,7 @@ def print_info(self) -> None:
 
     def configure(self) -> bool:
         """Configure."""
-        self._timestamp = (
-            datetime.datetime.utcnow().replace(microsecond=0).replace(tzinfo=datetime.timezone.utc).isoformat()
-        )
+        self._timestamp = datetime.datetime.now(datetime.timezone.utc).replace(microsecond=0).isoformat()
         # config verbosity
         self._quiet = self._config.get('quiet', False)
         self._verbose = not self._quiet