Prepare release

Author: sebastianbergmann

ChangeLog-10.3.md

@@ -23,4 +23,4 @@ All notable changes of the PHPUnit 10.3 release series are documented in this fi
 
 * [#5456](https://github.com/sebastianbergmann/phpunit/issues/5456): Risky Test Check for Output Buffering is performed before after-test methods are called
 
-[10.3.0]: https://github.com/sebastianbergmann/phpunit/compare/10.2.7...main
+[10.3.0]: https://github.com/sebastianbergmann/phpunit/compare/10.2.7...10.3.0

src/Runner/Version.php

@@ -34,7 +34,7 @@ public static function id(): string
         }
 
         if (self::$version === '') {
-            self::$version = (new VersionId('10.3', dirname(__DIR__, 2)))->asString();
+            self::$version = (new VersionId('10.3.0', dirname(__DIR__, 2)))->asString();
         }
 
         return self::$version;