docs(aurora): updated some commands

.docs/aurora/configuration.md

@@ -80,9 +80,23 @@ Manage the immunity whitelist.
 - Usage: `[p]aurora timedelta <duration>`
 - Aliases: `tdc, td, and timedeltaconvert`
 
-This command converts a duration to a [`timedelta`](https://docs.python.org/3/library/datetime.html#datetime.timedelta) Python object.
+This command converts a duration to a [`timedelta`](https://docs.python.org/3/library/datetime.html#datetime.timedelta) Python object.You cannot convert years or months as they are not fixed units. Use `[p]aurora relativedelta` for that.
 
 **Example usage**  
-`[p]timedelta 1 day 15hr 82 minutes 52s`  
+`[p]aurora timedelta 1 day 15hr 82 minutes 52s`
+
 **Output**  
 `1 day, 16:22:52`
+
+### aurora relativedelta
+
+- Usage: `[p]aurora relativedelta <duration>`
+- Aliases: `rdc, rd, and relativedeltaconvert`
+
+This command converts a duration to a [`relativedelta`](https://dateutil.readthedocs.io/en/stable/relativedelta.html) Python object.
+
+**Example usage**  
+`[p]aurora relativedelta 3 years 1 day 15hr 82 minutes 52s`
+
+**Output**  
+`relativedelta(years=+3, days=+1, hours=+15, minutes=+82, seconds=+52)`