Update README_en.md

Author: hellojukay

Diff for: README_en.md

@@ -5,7 +5,7 @@ A simple static file server write in pure golang, support upload。
 [![build](https://github.com/hellojukay/httpfs/actions/workflows/go-build.yml/badge.svg?event=push)](https://github.com/hellojukay/httpfs/actions/workflows/go-build.yml)
 
 
-# install
+# Install
 ```shell
 // build require golang 1.16+
  go install github.com/hellojukay/httpfs
@@ -14,7 +14,7 @@ A simple static file server write in pure golang, support upload。
 v0.2.13 h1:PMdqIhrKOVJx+/wtPUK67bbKx23aHzpc5m4CgnHo6gU=
  ```
 ![demo](demo.gif)
-# feature
+# Feature
 * Single binary file
 * Cross platform
 * Upload support