minor #1517 Fix small comment hiccup (Nispeon)

This PR was merged into the main branch.

Discussion
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Fix small comment hiccup

Hello, I opened this tiny PR because I noticed this little error in a comment.

Despite the size, I think it's a rather confusing error, because not knowing how locales work myself, I am not sure whether it was `an` or `no` that I should remove to fix the comment.

Hopefully I got it right 🙏🏽

Commits
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7066364 Fix small comment hiccup

src/EventSubscriber/RedirectToPreferredLocaleSubscriber.php

@@ -46,7 +46,7 @@ public function __construct(
 
         // Add the default locale at the first position of the array,
         // because Symfony\HttpFoundation\Request::getPreferredLanguage
-        // returns the first element when no an appropriate language is found
+        // returns the first element when no appropriate language is found
         array_unshift($this->enabledLocales, $this->defaultLocale);
         $this->enabledLocales = array_unique($this->enabledLocales);
     }