try to fix several missing favicons in doc

Author: ytdHuang

docs/src/.vitepress/config.mts

@@ -28,6 +28,7 @@ export default defineConfig({
     cleanUrls: true,
     outDir: 'REPLACE_ME_DOCUMENTER_VITEPRESS', // This is required for MarkdownVitepress to work correctly...
     head: [
+      ['link', { rel: 'icon', href: '/QuantumToolbox.jl/favicon.ico' }],
       ['link', { rel: 'icon', href: 'REPLACE_ME_DOCUMENTER_VITEPRESS_FAVICON' }],
       ['script', {src: `/QuantumToolbox.jl/versions.js`}],
       ['script', {src: `${baseTemp.base}siteinfo.js`}]