Update release notes

Signed-off-by: Leandro Lucarella <luca-frequenz@llucax.com>

RELEASE_NOTES.md

@@ -53,8 +53,6 @@
 
 * The following symbols were moved to the top-level `frequenz.channels` package:
 
-  - `Merge`
-  - `MergeNamed`
   - `Selected`
   - `SelectError`
   - `SelectErrorGroup`
@@ -68,6 +66,14 @@
 
   This channel was removed as it is not recommended practice and was a niche use case. If you need to use it, you can set up two channels or copy the `Bidirectional` class from the previous version to your project.
 
+* `Merge`
+
+  Replaced by the new `merge()` function. When replacing `Merge` with `merge()` please keep in mind that this new function will raise a `ValueError` if no receivers are passed to it.
+
+* `MergeNamed`
+
+  This class was redundant, use either the new `merge()` function or `select()` instead.
+
 * `Peekable`
 
   This class was removed because it was merely a shortcut to a receiver that caches the last value received. It did not fit the channel abstraction well and was infrequently used.
@@ -92,6 +98,8 @@
 
 ## New Features
 
+* A new `merge()` function was added to replace `Merge`.
+
 * `Anycast`
 
   - The following new read-only properties were added:
@@ -126,14 +134,6 @@
 
   - A more useful implementation of `__str__ and `__repr__` were added.
 
-* `Merge`
-
-  - A more useful implementation of `__str__ and `__repr__` were added.
-
-* `MergeNamed`
-
-  - A more useful implementation of `__str__ and `__repr__` were added.
-
 * `Peekable`
 
   - A more useful implementation of `__str__ and `__repr__` were added.