docs: 📝 update docstrings for Asset and Attachment classes to clarify hash return values (#2832)

📝 update docstrings for Asset and Attachment classes to clarify hash return values

Author: Paillat-dev

discord/asset.py

@@ -144,7 +144,9 @@ class Asset(AssetMixin):
 
         .. describe:: hash(x)
 
-            Returns the hash of the asset.
+            Returns the asset's url's hash.
+
+            This is equivalent to hash(:attr:`url`).
     """
 
     __slots__: tuple[str, ...] = (

discord/message.py

@@ -146,7 +146,9 @@ class Attachment(Hashable):
 
         .. describe:: hash(x)
 
-            Returns the hash of the attachment.
+            Returns the attachment's unique identifier.
+
+            This is equivalent to :attr:`id`.
 
     .. versionchanged:: 1.7
         Attachment can now be cast to :class:`str` and is hashable.