docs: fix multiple typo in front page (#5235)

site/docs/index.md

@@ -12,15 +12,15 @@ egg:
     link: /intro/quickstart
   features:
     - title: Complete ecology
-      desc: Based on open source ecology, customized for ant-ecology, can be integrated to backend middleware in one minute, supporting multiple depolyment enviroments.
+      desc: Based on open source ecology, customized for ant-ecology, can be integrated to backend middleware in one minute, supporting multiple deployment environments.
       icon: /img_egg/icon-3.png
     - title: Efficient and natural development experience.
       desc: Progressive development, smooth learning curve, one-stop development kit, supporting your whole process of development.
       icon: /img_egg/icon-4.png
     - title: High Quality & Reliability
-      desc: With high-quality, complete tests, built-in security policy, withstanded the larggest amout of traffic like Double 11 Promotion.
+      desc: With high-quality, complete tests, built-in security policy, withstand the largest amount of traffic like Double 11 Promotion.
       icon: /img_egg/icon-2.png
-    - title: Flexiable & High scalability
+    - title: Flexible & High scalability
       desc: Convention over configuration, highly flexible customization, industry-leading plugin systems and upper-layer business-specific framework systems.
       icon: /img_egg/icon-1.png
 ---