Update README.md

Author: shenxianpeng

README.md

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 [![Rocket MV BASIC Docs](https://img.shields.io/badge/Rocket%20MV%20BASIC-Docs-brightgreen?style=flat-square)](https://rocketsoftware.github.io/rocket-mvbasic/)
 [![Rocket MV BASIC Docs](https://img.shields.io/badge/Rocket%20MV%20BASIC-Forum-brightgreen?style=flat-square)](https://community.rocketsoftware.com/forums/multivalue?CommunityKey=521bce2e-71d5-4d32-b560-dfa95e950eb5)
 ![Visual Studio Marketplace Version](https://img.shields.io/visual-studio-marketplace/v/rocketsoftware.rocket-mvbasic?style=flat-square)
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