fix(seo): correct business address to Calle Borde Alegre, 1

Replaces the previously confirmed Calle Camino Vivero, 6 -- owner gave a
corrected address. Updated in JSON-LD PostalAddress, footer, /contacto,
and llms.txt.

src/components/SiteFooter.astro

@@ -20,7 +20,7 @@ const whatsappAriaLabel = 'Contactar con MNQ por WhatsApp';
         <div style="display:flex;flex-direction:column;gap:0.35rem;margin-top:var(--space-4);">
           <a href="tel:+34678171513" class="footer-link" style="width:fit-content;">+34 678 17 15 13</a>
           <a href="https://www.mnqeventos.es" class="footer-link" style="width:fit-content;">www.mnqeventos.es</a>
-          <p class="text-body-sm" style="width:fit-content;">Calle Camino Vivero, 6, 29014, Málaga</p>
+          <p class="text-body-sm" style="width:fit-content;">Calle Borde Alegre, 1, 29014, Málaga</p>
         </div>
       </div>