fix(site): update macOS companion download requirement to 15+ (#61)

Co-authored-by: diddy <fd@NERV>

Author: fragmential

src/pages/index.astro

@@ -283,7 +283,7 @@ const duration2 = (row2.length / 2 * pixelsPerItem) / pixelsPerSecond;
               </svg>
               Download for macOS
             </a>
-            <span class="macos-meta">Requires macOS 14+ · Universal Binary</span>
+            <span class="macos-meta">Requires macOS 15+ · Universal Binary</span>
           </div>
         </div>
       </div>