Update README.md

Author: JeremyMain

README.md

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 # GPUProfiler
 
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+[![Github All Releases](https://img.shields.io/github/downloads/JeremyMain/GPUProfiler/total.svg)](https://github.com/JeremyMain/GPUProfiler/releases)
 
 ## Latest Release
 The latest release of GPUProfiler is v1.07a on 05-07-2019