minor symfony#24286 added missing @author tag for new class (OskarStark)

This PR was submitted for the master branch but it was merged into the 3.4 branch instead (closes symfony#24286).

Discussion
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added missing @author tag for new class

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | no
| New feature?  | no <!-- don't forget updating src/**/CHANGELOG.md files -->
| BC breaks?    | no
| Deprecations? | no <!-- don't forget updating UPGRADE-*.md files -->
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        | --<!--highly recommended for new features-->

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just a small fix

Commits
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e17426c added missing @author tag for new class

Author: nicolas-grekas

src/Symfony/Component/DependencyInjection/EnvVarProcessor.php

@@ -15,6 +15,9 @@
 use Symfony\Component\DependencyInjection\Exception\EnvNotFoundException;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 
+/**
+ * @author Nicolas Grekas <[email protected]>
+ */
 class EnvVarProcessor implements EnvVarProcessorInterface
 {
     private $container;