Update README.md

Author: jfullstackdev

README.md

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 # Grading System through Spring Boot
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+*`updated 21 April 2022`*
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 [![Hits](https://hits.seeyoufarm.com/api/count/incr/badge.svg?url=https%3A%2F%2Fgithub.com%2Fxdvrx1%2FStudentGradingSystem&count_bg=%2379C83D&title_bg=%23555555&icon=&icon_color=%23E7E7E7&title=PAGE+VIEWS&edge_flat=false)](https://hits.seeyoufarm.com)
 
 ![GUI](resources/screenshot1.png)