Improve README

Author: TIny-Hacker

README.md

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 # TI-BASIC Syntax Highlighting <a href="https://marketplace.visualstudio.com/items?itemName=tiny-hacker.ti-basic"><img alt="Visual Studio Marketplace Version" src="https://img.shields.io/visual-studio-marketplace/v/tiny-hacker.ti-basic?label=Visual%20Studio%20Marketplace"></a> <a href="https://marketplace.visualstudio.com/items?itemName=tiny-hacker.ti-basic"><img alt="Visual Studio Marketplace Downloads" src="https://img.shields.io/visual-studio-marketplace/d/tiny-hacker.ti-basic"></a> <a href="https://marketplace.visualstudio.com/items?itemName=tiny-hacker.ti-basic"><img alt="Visual Studio Marketplace Rating" src="https://img.shields.io/visual-studio-marketplace/r/tiny-hacker.ti-basic"></a>
 
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 ## About
 This extension provides syntax highlighting for the z80 TI-BASIC language. This extension is meant specifically for the TI-84 Plus CE/83 Premium CE calculators, though it may work with others as well. Other useful features may be added in the future!
 
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 ## Bugs
 If you find a bug or want something added, be sure to [make an issue](https://github.com/TIny-Hacker/language-ti-basic/issues) and let me know!
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+© Copyright 2023 TIny_Hacker