fix: AttributeError using PartialMessage.edit(embed=None) (#2446)

* Update message.py

* changelog

---------

Co-authored-by: Readeem <[email protected]>

Author: Readeem

CHANGELOG.md

@@ -44,6 +44,8 @@ These changes are available on the `master` branch, but have not yet been releas
   ([#2411](https://github.com/Pycord-Development/pycord/pull/2411))
 - Fixed option typehints being ignored when using `parameter_name`.
   ([#2417](https://github.com/Pycord-Development/pycord/pull/2417))
+- Fixed parameter `embed=None` causing `AttributeError` on `PartialMessage.edit`.
+  ([#2446](https://github.com/Pycord-Development/pycord/pull/2446))
 
 ### Changed
 

discord/message.py

@@ -2039,7 +2039,7 @@ async def edit(self, **fields: Any) -> Message | None:
             raise InvalidArgument("Cannot pass both embed and embeds parameters.")
 
         if embed is not MISSING:
-            fields["embeds"] = [embed.to_dict()]
+            fields["embeds"] = [] if embed is None else [embed.to_dict()]
 
         if embeds is not MISSING:
             fields["embeds"] = [embed.to_dict() for embed in embeds]