docs: typo: object rest spread (#3556) [ci skip]

Author: Jinjiang

packages/@vue/babel-preset-app/README.md

@@ -18,7 +18,7 @@ This is the default Babel preset used in all Vue CLI projects. **Note: this pres
 
 ### Stage 3 or Below
 
-Only the following stage 3 or below features are supported (object reset spread is supported as part of `preset-env`):
+Only the following stage 3 or below features are supported (object rest spread is supported as part of `preset-env`):
 
 - [Dynamic Import Syntax](https://github.com/tc39/proposal-dynamic-import)
 - [Proposal Class Properties](https://babeljs.io/docs/en/next/babel-plugin-proposal-class-properties.html)
@@ -102,4 +102,4 @@ Setting this to `true` will generate code that is more performant but less spec-
 
 - Default: `[]`
 
-Multi page repo use entryFiles to ensure inject polyfills to all entry file.
+Multi page repo use `entryFiles` to ensure inject polyfills to all entry file.