Prepare release

Author: sebastianbergmann

ChangeLog-12.4.md

@@ -15,4 +15,4 @@ All notable changes of the PHPUnit 12.4 release series are documented in this fi
 * [#6284](https://github.com/sebastianbergmann/phpunit/issues/6284): `#[RunClassInSeparateProcess]` attribute
 * [#6355](https://github.com/sebastianbergmann/phpunit/issues/6355): Support for version constraint string argument without explicit version comparison operator
 
-[12.4.0]: https://github.com/sebastianbergmann/phpunit/compare/12.3.15...main
+[12.4.0]: https://github.com/sebastianbergmann/phpunit/compare/12.3.15...12.4.0

src/Runner/Version.php

@@ -35,7 +35,7 @@ public static function id(): string
         }
 
         if (self::$version === '') {
-            self::$version = (new VersionId('12.4', dirname(__DIR__, 2)))->asString();
+            self::$version = (new VersionId('12.4.0', dirname(__DIR__, 2)))->asString();
         }
 
         return self::$version;