Prepare release v2.4.1 (dart-lang/web_socket_channel#301)

pkgs/web_socket_channel/CHANGELOG.md

diff --git a/pkgs/web_socket_channel/CHANGELOG.md b/pkgs/web_socket_channel/CHANGELOG.md
index 011eed1..4cb9234 100644
--- a/pkgs/web_socket_channel/CHANGELOG.md
+++ b/pkgs/web_socket_channel/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 2.4.1-wip
+## 2.4.1
 
 - Update the examples to use `WebSocketChannel.ready` and clarify that
   `WebSocketChannel.ready` should be awaited before sending data over the

pkgs/web_socket_channel/pubspec.yaml

diff --git a/pkgs/web_socket_channel/pubspec.yaml b/pkgs/web_socket_channel/pubspec.yaml
index 5c3b9cf..1806546 100644
--- a/pkgs/web_socket_channel/pubspec.yaml
+++ b/pkgs/web_socket_channel/pubspec.yaml
@@ -1,5 +1,5 @@
 name: web_socket_channel
-version: 2.4.1-wip
+version: 2.4.1
 
 description: >-
   StreamChannel wrappers for WebSockets. Provides a cross-platform