chore: update doc (#18946)

README.md

@@ -105,11 +105,6 @@ You can also try Element Plus out with the components built-in playground.
           <img width="130px" src="https://github.com/element-plus/element-plus/assets/82012629/0004917d-71ad-48f9-b3ce-9299f0ff78c6">
         </a>
       </td>
-      <td align="center" valign="middle">
-        <a href="https://fantastic-admin.github.io/" target="_blank">
-          <img width="130px" src="https://github.com/element-plus/element-plus/assets/82012629/fdff8d8f-83e8-4986-9949-c5b4e0d30217">
-        </a>
-      </td>
       <td align="center" valign="middle">
         <a href="https://bit.dev/?from=element-ui" target="_blank">
           <img width="130px" src="https://user-images.githubusercontent.com/10095631/41342907-e44e7196-6f2f-11e8-92f2-47702dc8f059.png">

docs/.vitepress/config/sponsors.ts

@@ -29,14 +29,6 @@ export const rightLogoSmallSponsors = [
     slogan: 'Fast and elegant low-code dev platform',
     slogan_cn: '快速且优雅的低代码平台',
   },
-  {
-    name: 'Fantastic-admin',
-    img: '/images/sponsors/fantastic-admin.png',
-    imgL: '/images/sponsors/fantastic-admin-l.png',
-    url: 'https://fantastic-admin.github.io/',
-    slogan: 'Out-of-the-box Vue3 management system framework',
-    slogan_cn: '一款开箱即用的 Vue3 中后台管理系统框架',
-  },
   {
     name: 'bit',
     img: '/images/bit.svg',

docs/.vitepress/vitepress/components/vp-sponsors.vue

@@ -10,7 +10,7 @@ const sponsor = computed(() => sponsorLocale[lang.value])
 </script>
 
 <template>
-  <div class="page-sidebar-layout">
+  <div class="page-sidebar-group">
     <p class="title">{{ sponsor.sponsoredBy }}</p>
     <VPSponsorLarge />
     <VPSponsorSmall />
@@ -18,7 +18,7 @@ const sponsor = computed(() => sponsorLocale[lang.value])
 </template>
 
 <style lang="scss" scoped>
-.page-sidebar-layout {
+.page-sidebar-group {
   padding-bottom: 10px;
   padding-top: 0;
   .title {