fix(shell): Point About dialog License link to docs site

The License link in the About dialog pointed at the raw LICENSE.md on
GitHub. Point it at the canonical legal reference on leapmux.dev so users
land on the rendered docs page instead.

Author: trustin

frontend/src/components/shell/AboutDialog.tsx

@@ -64,7 +64,7 @@ export const AboutDialog: Component<AboutDialogProps> = (props) => {
           </div>
           <div>
             <div class={labelRow}>License</div>
-            <a href="https://github.com/leapmux/leapmux/blob/main/LICENSE.md" target="_blank" rel="noopener noreferrer">
+            <a href="https://leapmux.dev/docs/reference/legal/" target="_blank" rel="noopener noreferrer">
               Functional Source License, Version 1.1, ALv2 Future License
             </a>
           </div>