Update timestamp handling (#314)

Co-authored-by: DevilXD <DevilXD@users.noreply.github.com>

utils.py

@@ -109,6 +109,9 @@ def json_minify(data: JsonType | list[JsonType]) -> str:
 
 
 def timestamp(string: str) -> datetime:
+    try:
+        return datetime.strptime(string, "%Y-%m-%dT%H:%M:%S.%fZ").replace(tzinfo=timezone.utc)
+    except ValueError:
         return datetime.strptime(string, "%Y-%m-%dT%H:%M:%SZ").replace(tzinfo=timezone.utc)