chore: update branding assets to Maqtaa

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

docs/.vitepress/config.mts

@@ -11,7 +11,7 @@ export default defineConfig({
     },
     themeConfig: {
         // https://vitepress.dev/reference/default-theme-config
-        logo: '../../public/img/opengist.png',
+        logo: '../../public/img/maqtaa.png',
         logoLink: '/',
         nav: [
             { text: 'Demo', link: 'https://demo.opengist.io' },