minor symfony#590 Typo in code comment (OskarStark)

This PR was merged into the 1.5-dev branch.

Discussion
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Typo in code comment

Commits
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59801fe Typo in code comment

src/Flex.php

@@ -295,7 +295,7 @@ public function configureProject(Event $event)
         // new projects are most of the time proprietary
         $manipulator->addMainKey('license', 'proprietary');
 
-        // replace unbounded contraints for symfony/* packages by extra.symfony.require
+        // replace unbounded constraints for symfony/* packages by extra.symfony.require
         $config = json_decode($contents, true);
         if ($symfonyVersion = $config['extra']['symfony']['require'] ?? null) {
             $versions = $this->downloader->getVersions();