docs: Add auto-release badge to README (#391)

Author: mtrezza

README.md

@@ -4,7 +4,7 @@
 
 [![Build Status](https://github.com/parse-community/Parse-SDK-dotNET/workflows/ci/badge.svg?branch=master)](https://github.com/parse-community/Parse-SDK-dotNET/actions?query=workflow%3Aci+branch%3Amaster)
 [![Coverage](https://img.shields.io/codecov/c/github/parse-community/Parse-SDK-dotNET/master.svg)](https://codecov.io/github/parse-community/Parse-SDK-dotNET?branch=master)
-
+[![auto-release](https://img.shields.io/badge/%F0%9F%9A%80-auto--release-9e34eb.svg)](https://github.com/parse-community/Parse-SDK-dotNET/releases)
 
 [![Nuget](https://img.shields.io/nuget/v/parse.svg)](http://nuget.org/packages/parse)