Update README.md

Author: napen123

README.md

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 Mathos is a collection of tools for any kinds of mathematical calculations. It allows you to work with shapes, finance, unit conversions, and more!
 
 ####PM> Install-Package Mathos
-####[Java Port](https://github.com/MathosProject/MathosCore)
+####[Java Port](https://github.com/MathosProject/Mathos-Project-Java)
 
 *Mathos is single library that contains different functions in areas like: Arithmetic, Coordinate Geometry, Fractions. For the moment, it's not quite finished, and more features will be added.*