Update README

Author: myloveCc

README.md

@@ -7,19 +7,22 @@
 NETCore encrypt and decrpty tool，Include AES，RSA，MD5，SAH1，SAH256，SHA384，SHA512 and more
 
 To install NETCore.Encrypt, run the following command in the [Package Manager Console](https://docs.microsoft.com/zh-cn/nuget/tools/package-manager-console)
-```
-//Package Manager
 
+## Package Manager
+```
 Install-Package NETCore.Encrypt -Version 2.0.8
-
-//.NET CLI
+```
+##.NET CLI
+```
 dotnet add package NETCore.Encrypt --version 2.0.8
+```
 
-//PackageReference
+## PackageReference
+```
 <PackageReference Include="NETCore.Encrypt" Version="2.0.8" />
-
 ```
 
+
 ***
 
 # Easy to use with `EncryptProvider`