fix: restore 'Full Background' button text in about page callout

Author: saadshahd

src/pages/about.astro

@@ -48,7 +48,7 @@ const domainsItems = [
             <Triangle class="w-5 h-5 inline mr-1" />
             Curious about the <strong>why</strong> first—it sometimes reveals the <strong>how,</strong> but always clarifies what we're building.
           </div>
-          <Button variant="primary" size="sm" href="/portfolio" class="mt-3 md:mt-0">See Case Studies</Button>
+          <Button variant="primary" size="sm" href="/portfolio" class="mt-3 md:mt-0">Full Background</Button>
         </div>
       </Callout>