Fix banner image path for GitHub Pages compatibility

Change banner image from absolute path (/files/...) to relative
path (files/...) to work with GitHub Pages subdirectory deployment.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: DrorSh

index.qmd

@@ -36,7 +36,7 @@ include-in-header:
 {{< include /files/includes/_msclarity.qmd >}}
 
 ::: {.hero-banner-wrapper}
-<div class="hero-banner" style="background-image: url('/files/images/i3-banner.png'); background-size: cover; background-position: center; padding: 4rem 2rem; text-align: center;">
+<div class="hero-banner" style="background-image: url('files/images/i3-banner.png'); background-size: cover; background-position: center; padding: 4rem 2rem; text-align: center;">
   <h1 style="color: #333333; font-size: 48px; font-weight: bold; margin-bottom: 0.5rem;">Innovation Information Initiative</h1>
   <p style="color: #333333; font-size: 24px; margin-top: 0;">A data collaborative for innovation datasets, analytics, + metrics</p>
 </div>