minor #14857 [DependencyInjection] Require preprocessor env name fix used in PHP snippet (brzuchal)

This PR was submitted for the 5.x branch but it was merged into the 4.4 branch instead.

Discussion
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[DependencyInjection] Require preprocessor env name fix used in PHP snippet

A PHP code snippet for `require` preprocessor defines default environment variable with a different name than used in parameter resolution.

Commits
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0f95e07 Require preprocessor env name fix used in PHP snippet

Author: javiereguiluz

configuration/env_var_processors.rst

@@ -394,7 +394,7 @@ Symfony provides the following env var processors:
             // config/packages/framework.php
             $container->setParameter('env(PHP_FILE)', '../config/.runtime-evaluated.php');
             $container->loadFromExtension('app', [
-                'auth' => '%env(require:AUTH_FILE)%',
+                'auth' => '%env(require:PHP_FILE)%',
             ]);
 
     .. versionadded:: 4.3