[Configuration] Add missing LevelSetList::UP_TO_PHP_84 on PhpLevelSet…

…Resolver::resolveFromPhpVersion() (#5890)

src/Configuration/PhpLevelSetResolver.php

@@ -26,6 +26,7 @@ public static function resolveFromPhpVersion(int $phpVersion): string
             PhpVersion::PHP_81 => LevelSetList::UP_TO_PHP_81,
             PhpVersion::PHP_82 => LevelSetList::UP_TO_PHP_82,
             PhpVersion::PHP_83 => LevelSetList::UP_TO_PHP_83,
+            PhpVersion::PHP_84 => LevelSetList::UP_TO_PHP_84,
             default => throw new InvalidConfigurationException(sprintf(
                 'Could not resolve PHP level set list for "%s"',
                 $phpVersion