a small fix

Author: Afif13

index.html

@@ -1520,7 +1520,7 @@ <h1><span>C</span><span>S</span><span>S</span> Pattern</h1>
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+    <a target="_blank" href="https://twitter.com/intent/tweet?url=https%3A%2F%2Fcss-pattern.com&amp;via=ChallengesCss&amp;text=Fancy%20backgrounds%20with%20CSS%20gradients!&amp;hashtags=CSS" class="tweet"><img alt="Twitter" src="twitter-24.png" width="24" height="24"></a>
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