style(footer): mark на чёрном фоне 22px (вместо синего 18px)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/components/Footer.astro

@@ -12,7 +12,7 @@ const year = new Date().getFullYear();
     </nav>
     <p class="developer">
       <a href="https://hhivp.com/" rel="noopener" target="_blank" class="dev-credit">
-        <img src="/hhivp-mark.svg" alt="" width="18" height="18" class="dev-credit-mark" />
+        <img src="/hhivp-mark.svg" alt="" width="22" height="22" class="dev-credit-mark" />
         <span>Разработка&nbsp;— hhivp.com</span>
       </a>
     </p>