Preparing for release, 2.4.0.

Author: ericproulx

CHANGELOG.md

@@ -1,4 +1,4 @@
-### 2.4.0 (Next)
+### 2.4.0 (2025-06-18)
 
 #### Features
 
@@ -16,7 +16,6 @@
 * [#2561](https://github.com/ruby-grape/grape/pull/2561): Optimize hash alloc for middleware's default options - [@ericproulx](https://github.com/ericproulx).
 * [#2563](https://github.com/ruby-grape/grape/pull/2563): Update `Grape::Middleware::Auth::Base` - [@ericproulx](https://github.com/ericproulx).
 * [#2571](https://github.com/ruby-grape/grape/pull/2571): Update RuboCop 1.75.8 - [@pieterocp](https://github.com/pieterocp).
-* Your contribution here.
 
 #### Fixes
 
@@ -27,7 +26,6 @@
 * [#2548](https://github.com/ruby-grape/grape/pull/2548): Formatting from header acts like versioning from header - [@ericproulx](https://github.com/ericproulx).
 * [#2552](https://github.com/ruby-grape/grape/pull/2552): Fix declared params optional array - [@ericproulx](https://github.com/ericproulx).
 * [#2553](https://github.com/ruby-grape/grape/pull/2553): Improve performance of query params parsing - [@ericproulx](https://github.com/ericproulx).
-* Your contribution here.
 
 ### 2.3.0 (2025-02-08)
 

README.md

@@ -156,8 +156,8 @@ Grape is a REST-like API framework for Ruby. It's designed to run on Rack or com
 
 ## Stable Release
 
-You're reading the documentation for the next release of Grape, which should be 2.4.0.
-The current stable release is [2.3.0](https://github.com/ruby-grape/grape/blob/v2.3.0/README.md).
+You're reading the documentation for the stable release of Grape, 2.4.0.
+Please read [UPGRADING](https://github.com/ruby-grape/grape/blob/v2.4.0/UPGRADING.md) when upgrading from a previous version.
 
 ## Project Resources