Update public/index.html

public/index.html

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             <li data-filter=".filter-product">Produkte</li>
             <li data-filter=".filter-branding">Evaluationen</li>
             <li data-filter=".filter-books">Sonstiges</li>
-</ul><!-- End Portfolio Filters -->
+          </ul><!-- End Portfolio Filters -->
 
-<div class="row gy-4 isotope-container" data-aos="fade-up" data-aos-delay="200">
+        <div class="row gy-4 isotope-container" data-aos="fade-up" data-aos-delay="200">
 
           <div class="col-lg-4 col-md-6 portfolio-item isotope-item filter-app">
               <div class="portfolio-content h-100">
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               <div class="portfolio-info">
               <h4>Paper 1</h4>
               <p>Short-Answer Grading for German: Addressing the Challenges</p>
-        <a href="ausschreibung/img/pado-paper1.PNG" title="" data-gallery="portfolio-gallery-app" class="glightbox preview-link"><i class="bi bi-zoom-in"></i></a>
+              <a href="ausschreibung/img/pado-paper1.PNG" title=""  data-gallery="portfolio-gallery-app" class="glightbox preview-link"><i class="bi bi-zoom-in"></ i></a>
               <a href="https://doi.org/10.1007/s40593-023-00383-w" title="Padó, U., Eryilmaz, Y. & Kirschner, L. (2023). Short-Answer Grading for German: Addressing the Challenges. Int J Artif Intell Educ. https://doi.org/10.1007/s40593-023-00383-w" class="details-link"><i class="bi bi-link-45deg"></i></a>
             </div>
             </div>