Update docstrings

Signed-off-by: liamhuber <liamhuber@greyhavensolutions.com>

pyiron_workflow/channels.py

@@ -296,8 +296,9 @@ class DataChannel(FlavorChannel["DataChannel"], typing.Generic[ReceiverType], AB
     more specific than the input channel.
 
     In addition to connections, these channels can have a single partner
-    (:attr:`value_receiver: DataChannel`) that is of the _same_ class and obeys type
-    hints as though it were the "downstream" (input) partner in a connection.
+    (:attr:`value_receiver`) that is of the same data flavor and the same direction
+    (i.e. input or output) and obeys type hints as though it were the "downstream"
+    (input) partner in a connection.
     Channels with such partners pass any data updates they receive directly to this
     partner (via the :attr:`value` setter).
     (This is helpful for passing data between scopes, where we want input at one scope
@@ -351,9 +352,9 @@ class DataChannel(FlavorChannel["DataChannel"], typing.Generic[ReceiverType], AB
             when this channel is a value receiver. This can potentially be expensive, so
             consider deactivating strict hints everywhere for production runs. (Default
             is True, raise exceptions when type hints get violated.)
-        value_receiver (pyiron_workflow.compatibility.Self|None): Another channel of
-            the same class whose value will always get updated when this channel's
-            value gets updated.
+        value_receiver (ReceiverType|None): Another channel of the receiver type (i.e.
+            also a data flavor and matching input/output type) whose value will always
+            get updated when this channel's value gets updated.
     """
 
     def __init__(