feat(ui): enhance subtitle text for clarity and detail

- Updated the subtitle on the welcome page to better describe the purpose of the training sessions
- Text now specifies hands-on, interactive Git training for all skill levels
- Improves user understanding of the offering at a glance

index.html

@@ -14,7 +14,7 @@
                 <i class="fas fa-code-branch"></i>
             </div>
             <h2 class="title">Welcome to Git Training Hub !</h2>
-            <p class="subtitle">Master version control with our interactive training</p>
+            <p class="subtitle">Master version control and collaboration with our hands-on, interactive Git training sessions designed for all skill levels.</p>
             <div class="cta-buttons">
                 <button class="btn primary">Get Started</button>
                 <button class="btn secondary">Learn More</button>