fix(website): add missing navbar home bilingual translation on join page

website/join.html

@@ -47,7 +47,7 @@
             </a>
             <button class="hamburger" onclick="document.querySelector('.nav-links').classList.toggle('open')" aria-label="Menu">☰</button>
             <div class="nav-links">
-                <a href="index.html">Home</a>
+                <a href="index.html"><span lang="de">Startseite</span><span lang="en">Home</span></a>
                 <a href="https://github.com/shik3i/KoalaSync" target="_blank" style="display: inline-flex; align-items: center; gap: 6px;">
                     <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor" width="16" height="16" style="display: block;"><path d="M12 0c-6.626 0-12 5.373-12 12 0 5.302 3.438 9.8 8.207 11.387.599.111.793-.261.793-.577v-2.234c-3.338.726-4.033-1.416-4.033-1.416-.546-1.387-1.333-1.756-1.333-1.756-1.089-.745.083-.729.083-.729 1.205.084 1.839 1.237 1.839 1.237 1.07 1.834 2.807 1.304 3.492.997.107-.775.418-1.305.762-1.604-2.665-.305-5.467-1.334-5.467-5.931 0-1.311.469-2.381 1.236-3.221-.124-.303-.535-1.524.117-3.176 0 0 1.008-.322 3.301 1.23.957-.266 1.983-.399 3.003-.404 1.02.005 2.047.138 3.006.404 2.291-1.552 3.297-1.23 3.297-1.23.653 1.653.242 2.874.118 3.176.77.84 1.235 1.911 1.235 3.221 0 4.609-2.807 5.624-5.479 5.921.43.372.823 1.102.823 2.222v3.293c0 .319.192.694.801.576 4.765-1.589 8.199-6.086 8.199-11.386 0-6.627-5.373-12-12-12z"/></svg>
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