docs: tweak homepage action buttons

Author: meteorlxy

docs/README.md

@@ -2,8 +2,13 @@
 home: true
 title: Home
 heroImage: /hero.png
-actionText: Get Started →
-actionLink: /guide/getting-started.html
+actions:
+  - text: Get Started
+    link: /guide/getting-started.html
+    type: primary
+  - text: Introduction
+    link: /guide/
+    type: secondary
 features:
   - title: Simplicity First
     details: Minimal setup with markdown-centered project structure helps you focus on writing.

docs/zh/README.md

@@ -2,8 +2,13 @@
 home: true
 title: 首页
 heroImage: /hero.png
-actionText: 快速上手 →
-actionLink: /zh/guide/getting-started.html
+actions:
+  - text: 快速上手
+    link: /zh/guide/getting-started.html
+    type: primary
+  - text: 项目简介
+    link: /guide/
+    type: secondary
 features:
   - title: 简洁至上
     details: 以 Markdown 为中心的项目结构，以最少的配置帮助你专注于写作。