Update blog link in index.html

Author: DevLabStudy

index.html

@@ -74,7 +74,7 @@
         <div class="brand-subtitle">Self-Taught Infrastructure Enthusiast</div>
 
         <div class="path-grid">
-            <a href="/blog.html" class="path-card" style="border-top: 4px solid var(--accent-blue);">
+            <a href="/blog">Blog</a>
                 <div class="path-icon">📚</div>
                 <div class="path-title">DevLab Blog</div>
                 <p class="path-desc">Artykuły, wiedza, optymalizacja Dockera i IT.</p>