Improve 4.14.0 post

Add Psalm.

_posts/2024-06-13-slim-4.14.0-release.md

@@ -19,9 +19,9 @@ $container = $this->app->getContainer();
 $entries = $container->getKnownEntryNames();
 ```
 
-[PHPStan](https://phpstan.org/) has no way of knowing that <tt>$container</tt> is an instance of <tt>DI\Container</tt> which has a <tt>getKnownEntryNames()</tt> method and so will complain.
+[Psalm](https://psalm.dev) or [PHPStan](https://phpstan.org/) have no way of knowing that <tt>$container</tt> is an instance of <tt>DI\Container</tt> which has a <tt>getKnownEntryNames()</tt> method and so will complain.
 
-To inform PHPStan that we created <tt>Slim\App</tt> with PHP-DI, we change: <tt>/** @var \Slim\App $app */</tt> to <tt>/** @var \Slim\App<DI\Container> $app */</tt> and now PHPStan knows that <tt>getKnownEntryNames()</tt> is a valid method call on <tt>$container</tt>.
+To inform the static analyzer that we created <tt>Slim\App</tt> with PHP-DI, we change: <tt>/** @var \Slim\App $app */</tt> to <tt>/** @var \Slim\App<DI\Container> $app */</tt> and now PHPStan knows that <tt>getKnownEntryNames()</tt> is a valid method call on <tt>$container</tt>.
 
 
 ### Update your type hints