I think you just initialized your project so I won't be too harsh. Here's a few things I've noticed:
Structure-wise
You might want to move the closing </div> from line :23 to line :18 instead. This will separate your .container from your .attribution.
<div class="container">
<img src="./images/image-qr-code.png" alt="">
<h1>Improve your front-end skills by building projects</h1>
<p>Scan the QR code to visit Frontend Mentor and take your coding skills to the next level</p>
<div class="attribution">
Challenge by : <a href="https://www.frontendmentor.io?ref=challenge" target="_blank">Frontend Mentor</a>
Coded by : <a href="https://yogesh-Nagar.app">Yogesh Nagar</a>
</div>
</div>
Font-wise
You might want to connect a "Outfit" from Google Fonts
Alternatively
You can instead just copy and paste this code snippet at line :10 in your html
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Outfit:[email protected]&display=swap" rel="stylesheet">
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