Update README.md

Author: kshitizsaini113

README.md

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 Keep the track of tutorial files uploaded daywise and learn java
 
+Contributions guidelines can be found [here.](CONTRIBUTING.md)
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 ## Setting up JDK
 
 ```
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 Java is a general-purpose programming language that is class-based, object-oriented, and designed to have as few implementation dependencies as possible.
 
 ### Stable release: Java SE 14 / March 17, 2020; 
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+All the projects are licenced under [GNU GENERAL PUBLIC LICENSE](LICENSE)