Fixed typos in <transition-group> section (#1790)

Author: ChrissBott

src/v2/api/index.md

@@ -2431,11 +2431,11 @@ Used to denote a `<template>` element as a scoped slot, which is replaced by [`s
 
 - **Usage:**
 
-  `<transition-group>` serve as transition effects for **multiple** elements/components. The `<transition-group>` renders a real DOM element. By default it renders a `<span>`, and you can configure what element is should render via the `tag` attribute.
+  `<transition-group>` serve as transition effects for **multiple** elements/components. The `<transition-group>` renders a real DOM element. By default it renders a `<span>`, and you can configure what element it should render via the `tag` attribute.
 
   Note every child in a `<transition-group>` must be **uniquely keyed** for the animations to work properly.
 
-  `<transition-group>` supports moving transitions via CSS transform. When a child's position on screen has changed after an updated, it will get applied a moving CSS class (auto generated from the `name` attribute or configured with the `move-class` attribute). If the CSS `transform` property is "transition-able" when the moving class is applied, the element will be smoothly animated to its destination using the [FLIP technique](https://aerotwist.com/blog/flip-your-animations/).
+  `<transition-group>` supports moving transitions via CSS transform. When a child's position on screen has changed after an update, it will get applied a moving CSS class (auto generated from the `name` attribute or configured with the `move-class` attribute). If the CSS `transform` property is "transition-able" when the moving class is applied, the element will be smoothly animated to its destination using the [FLIP technique](https://aerotwist.com/blog/flip-your-animations/).
 
   ```html
   <transition-group tag="ul" name="slide">